Description: Quick Info
SOLO Harness
Works with SOLO
Genuine AIM Quality
Product Details
SOLO DL Ducati ECU interface harness*

Description: Quick Info
SOLO Mounting
Works with SOLO
Genuine AIM Quality
Product Details
SOLO Ducati titanium handlebar bracket*

Description: Rotobox BOOST Front Wheel

The new and improved model BOOST carbon fiber wheel from Rotobox, decreasing the weight from the RBX2 with improved design and higher performance! Comes in gloss and matte finish, in both symmetric and convex designs.

Like the RBX2, the BOOST is produced using Rotobox's unique 3-component composite - combining carbon, epoxy and stainless steel. By integrating the stainless 2,5 mm steel wire in each side of the rim, we increase its impact resistance at the most critical outer part. JWL and DOT approved, having met JASO T203-85 safety standards.

Another hidden BOOST gem - the Structural Rib. Thanks to the High Pressure Core Technology the structural rib is placed in the inner side between the spokes, with its mission to support the stress hot spot of the wheel. As a result the BOOST elegant spoke design brings greater stiffness and although the spokes are thinner the BOOST is stronger than ever - with a permissible static load of 280 kg on the rear and 180kg on the front wheel.

ASSEMBLING COMPONENTS
Carbon fiber composite rim, a one-piece hollow carbon cast, reinforced with stainless steel wire and UV protected; 7075 T6 aluminum alloy hubs, spacers and sprocket carrier [only with rear symmetric wheel]. machined from solid and hard anodized; polyurethane cushion drive set; SKF bearings; aluminum valve stem.

PRODUCT QUALITY CONTROL
Your Rotobox wheel has its own Serial Number to track the production history. We confirm to have performed quality verification procedure of your Rotobox wheel.

SIZE
17" x 3.5"

WEIGHT
REAR WHEEL WEIGHT 2.58 kg / 5.68 LBS

MAX. STATIC LOAD
REAR 180 kg / 400 LBS

MAX. OPERATING TEMPERATURE
100 C / 212 F

MAX. PRESSURE
4 BAR / 58 PSI

The wheels conform to safety standard JASO T203-85 for JWL dotE Certification. Before riding on public streets, be sure to check your local regulations.
Rotobox Boost Wheel set Weight example:
Stock S1000RR 11.70kg (25.79 lbs)
Rotobox Boost 6.69kg (14.74 lbs)
Weight saving more than 5.00kg of rotating mass. Incredible!

Description: Rotobox BOOST Front Wheel

The new and improved model BOOST carbon fiber wheel from Rotobox, decreasing the weight from the RBX2 with improved design and higher performance! Comes in gloss and matte finish, in both symmetric and convex designs.

Like the RBX2, the BOOST is produced using Rotobox's unique 3-component composite - combining carbon, epoxy and stainless steel. By integrating the stainless 2,5 mm steel wire in each side of the rim, we increase its impact resistance at the most critical outer part. JWL and DOT approved, having met JASO T203-85 safety standards.

Another hidden BOOST gem - the Structural Rib. Thanks to the High Pressure Core Technology the structural rib is placed in the inner side between the spokes, with its mission to support the stress hot spot of the wheel. As a result the BOOST elegant spoke design brings greater stiffness and although the spokes are thinner the BOOST is stronger than ever - with a permissible static load of 280 kg on the rear and 180kg on the front wheel.

ASSEMBLING COMPONENTS
Carbon fiber composite rim, a one-piece hollow carbon cast, reinforced with stainless steel wire and UV protected; 7075 T6 aluminum alloy hubs, spacers and sprocket carrier [only with rear symmetric wheel]. machined from solid and hard anodized; polyurethane cushion drive set; SKF bearings; aluminum valve stem.

PRODUCT QUALITY CONTROL
Your Rotobox wheel has its own Serial Number to track the production history. We confirm to have performed quality verification procedure of your Rotobox wheel.

SIZE
17" x 3.5"

WEIGHT
REAR WHEEL WEIGHT 2.58 kg / 5.68 LBS

MAX. STATIC LOAD
REAR 180 kg / 400 LBS

MAX. OPERATING TEMPERATURE
100 C / 212 F

MAX. PRESSURE
4 BAR / 58 PSI

The wheels conform to safety standard JASO T203-85 for JWL dotE Certification. Before riding on public streets, be sure to check your local regulations.
Rotobox Boost Wheel set Weight example:
Stock S1000RR 11.70kg (25.79 lbs)
Rotobox Boost 6.69kg (14.74 lbs)
Weight saving more than 5.00kg of rotating mass. Incredible!

Description:

Description:

Description:

Description: DU 931 Hypersport TTX 36 Shock

DU 931 - 12 inches (294.5 mm)

Description: Rotobox RBX2 Front Wheel

ASSEMBLING COMPONENTS
Carbon fiber composite rim, a one-piece hollow carbon cast, reinforced with stainless steel wire and UV protected; 7075 T6 aluminium alloy hubs, spacers and sprocket carrier [only with rear symmetric wheel]. machined from solid and hard anodized; polyurethane cushion drive set; SKF bearings; aluminium valve stem.

PRODUCT QUALITY CONTROL
Your Rotobox wheel has its own Serial Number to track the production history. We confirm to have performed quality verification procedure of your Rotobox wheel.

SIZE
17" x 3.5"

WEIGHT
REAR WHEEL WEIGHT 2.58 kg / 5.68 LBS

MAX. STATIC LOAD
REAR 150 kg / 330 LBS

MAX. OPERATING TEMPERATURE
100 C / 212 F

MAX. PRESSURE
4 BAR / 58 PSI

The wheels conform to safety standard JASO T203-85 for JWL dotE Certification. Before riding on public streets, be sure to check your local regulations.
The complete set of RBX2 wheels, without brake rotors and sprocket, weighs:
6,65 kg (14.6 lbs) for Kawasaki ZX10R
6,61 kg (14.5 lbs) for Aprilia RSV4
6,90 kg (15.1 lbs) for BMW S1000RR
5,35 kg (11.6 lbs) for Ducati 1199 Panigale

Description:

DUCATI 999 /1098 /1198 /821 /939 Hypermotard / 848 EVO /998 /748 03+ /Desmosedici RR /Monster 821 /1100 03+ /S4RS /S2R /1200 /1200S

Rotobox RBX2 Front Wheel

ASSEMBLING COMPONENTS
Carbon fiber composite rim, a one-piece hollow carbon cast, reinforced with stainless steel wire and UV protected; 7075 T6 aluminium alloy hubs, spacers and sprocket carrier [only with rear symmetric wheel]. machined from solid and hard anodized; polyurethane cushion drive set; SKF bearings; aluminium valve stem.

PRODUCT QUALITY CONTROL
Your Rotobox wheel has its own Serial Number to track the production history. We confirm to have performed quality verification procedure of your Rotobox wheel.

SIZE
17" x 3.5"

WEIGHT
REAR WHEEL WEIGHT 2.58 kg / 5.68 LBS

MAX. STATIC LOAD
REAR 150 kg / 330 LBS

MAX. OPERATING TEMPERATURE
100 C / 212 F

MAX. PRESSURE
4 BAR / 58 PSI

The wheels conform to safety standard JASO T203-85 for JWL dotE Certification. Before riding on public streets, be sure to check your local regulations.
The complete set of RBX2 wheels, without brake rotors and sprocket, weighs:
6,65 kg (14.6 lbs) for Kawasaki ZX10R
6,61 kg (14.5 lbs) for Aprilia RSV4
6,90 kg (15.1 lbs) for BMW S1000RR
5,35 kg (11.6 lbs) for Ducati 1199 Panigale

Description:

DUCATI 848 /821 /939 /996 /998 /748 /Monster 1100 03+ /S4RS /S2R

Rotobox RBX2 Convex Rear Wheel

ASSEMBLING COMPONENTS
Carbon fiber composite rim, a one-piece hollow carbon cast, reinforced with stainless steel wire and UV protected; 7075 T6 aluminium alloy hubs, spacers and sprocket carrier [only with rear symmetric wheel]. machined from solid and hard anodized; polyurethane cushion drive set; SKF bearings; aluminium valve stem.

PRODUCT QUALITY CONTROL
Your Rotobox wheel has its own Serial Number to track the production history. We confirm to have performed quality verification procedure of your Rotobox wheel.

SIZE
17" x 6.0"

WEIGHT
REAR WHEEL WEIGHT 2.93 kg / 6.45 LBS

MAX. STATIC LOAD
REAR 250 kg / 550 LBS

MAX. OPERATING TEMPERATURE
100 C / 212 F

MAX. PRESSURE
4 BAR / 58 PSI

The wheels conform to safety standard JASO T203-85 for JWL dotE Certification. Before riding on public streets, be sure to check your local regulations.
The complete set of RBX2 wheels, without brake rotors and sprocket, weighs:
6,65 kg (14.6 lbs) for Kawasaki ZX10R
6,61 kg (14.5 lbs) for Aprilia RSV4
6,90 kg (15.1 lbs) for BMW S1000RR
5,35 kg (11.6 lbs) for Ducati 1199 Panigale

Description:

DUCATI 1098 /1198 /1199 /1299 Panigale /Monster 1200 /1200S

Rotobox RBX2 Convex Rear Wheel

ASSEMBLING COMPONENTS
Carbon fiber composite rim, a one-piece hollow carbon cast, reinforced with stainless steel wire and UV protected; 7075 T6 aluminium alloy hubs, spacers and sprocket carrier [only with rear symmetric wheel]. machined from solid and hard anodized; polyurethane cushion drive set; SKF bearings; aluminium valve stem.

PRODUCT QUALITY CONTROL
Your Rotobox wheel has its own Serial Number to track the production history. We confirm to have performed quality verification procedure of your Rotobox wheel.

SIZE
17" x 6.0"

WEIGHT
REAR WHEEL WEIGHT 2.93 kg / 6.45 LBS

MAX. STATIC LOAD
REAR 250 kg / 550 LBS

MAX. OPERATING TEMPERATURE
100 C / 212 F

MAX. PRESSURE
4 BAR / 58 PSI

The wheels conform to safety standard JASO T203-85 for JWL dotE Certification. Before riding on public streets, be sure to check your local regulations.
The complete set of RBX2 wheels, without brake rotors and sprocket, weighs:
6,65 kg (14.6 lbs) for Kawasaki ZX10R
6,61 kg (14.5 lbs) for Aprilia RSV4
6,90 kg (15.1 lbs) for BMW S1000RR
5,35 kg (11.6 lbs) for Ducati 1199 Panigale

Description: APEX RACING DEVELOPMENT TITANIUM SWINGARM PINCH BOLT SET DUCATI 848, 1098, 899, 959, 1199, 1299
TSPBSD


- Reduce mass by replacing OEM steel bolts with our aircraft grade Titanium set.
- Switching to Titanium bolts provides instant 45% weight savings and more than twice tensile strength.
- Safety wire bores - Not bored. We can pre drill them for you at a 10$ charge.
- Bolt particulars M12x40 Allen Tapered bolt with a hollow core.
- Manufactured employing Ti-6Al-4V (Grade 5) Titanium alloy. This is non recycled aerospace specification Titanium alloy.
- Designed and manufactured in USA
- Our titanium products are manufactured to the highest quality standards and are priced very competitively.
- TWO (2) bolts per se

Description: Armour Bodies Ducati 848/1098/1198 Pro Series Superbike Kit 71-0640SB

Description: Armour Bodies Ducati 848/1098/1198 SuperBike Tail Seat Pad 71-0640PAD

Description: Armour Bodies Ducati 848/1098/1198 Supersport Kit 71-0640SS

Description: ATTACK PERFORMANCE BRAKE LEVER KIT, DUCATI, AERO HARD (REPLACEMENT PARTS) 51011015GE
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE BRAKE LEVER KIT, DUCATI, BLACK 51011015B
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE HANDLE BAR KIT, 53MM, BLACK 901108.53B
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE HANDLE BAR KIT, 53MM, BLACK (REPLACEMENT PARTS) 901108.53BE
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE REAR SET KIT W/SHIFT AND BRAKE LEVERS, DUCATI , AERO HARD (REPLACEMENT PARTS) 510110GE
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE REAR SET KIT W/SHIFT AND BRAKE LEVERS, DUCATI , BLACK 510110B
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE TRIPLE CLAMP KIT, DUCATI, 748, 748E, 749, 749DARK, 848, 848EVO, 1198 (53-53MM LS) 512112
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE TRIPLE CLAMP KIT, DUCATI, 748, 748E, 749, 749DARK, 848, 848EVO, 1198 (53-53MM LS) (REPLACEMENT PARTS) 512112E
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE TRIPLE CLAMP KIT, DUCATI, 748, 748E, 749, 749DARK, 848, 848EVO, 1198 (53-53MM LS), BLACK (REPLACEMENT PARTS) 512112BE
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE TRIPLE CLAMP KIT, GP, DUCATI, 1198R,1198S (53-56MM LS) 510112
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE TRIPLE CLAMP KIT, GP, DUCATI, 1198R,1198S (53-56MM LS), BLACK 510112B
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK PERFORMANCE TRIPLE CLAMP KIT, GP, DUCATI, 1198R,1198S (53-56MM LS), BLACK (REPLACEMENT PARTS) 510112BE
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK TRIPLE CLAMP KIT, GP, DUCATI, 748R, 749R, 996, 996R, 996S, 999R, 999S, 1098R, 1098S (53-56MM SS) (REPLACEMENT PARTS) 511112E
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK TRIPLE CLAMP KIT, GP, DUCATI, 748R, 749R, 996, 996R, 996S, 999R, 999S, 1098R, 1098S (53-56MM SS), BLACK 511112B
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK TRIPLE CLAMP KIT, GP, DUCATI, 748S, 749S, 916, 998, 998S, 999,1098 (53-53MM SS) 501112
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK TRIPLE CLAMP KIT, GP, DUCATI, 748S, 749S, 916, 998, 998S, 999,1098 (53-53MM SS) (REPLACEMENT PARTS) 501112E
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: ATTACK TRIPLE CLAMP KIT, GP, DUCATI, 748S, 749S, 916, 998, 998S, 999,1098 (53-53MM SS), BLACK (REPLACEMENT PARTS) 501112BE
MADE IN USA At Attack Performance they have set up many championship winning chassis along with designing, manufacturing, and building our own MotoGP machine with their own parts. Attack Performance utilizes chassis simulation software to find critical dimensions such as Rake, Trail, Wheel Forces, and Linkage Ratios, just to name a few. Those tools combined with their decades of racing eliminates the guesswork from chassis setup.

Description: Bonamici Aluminum lever kit Ducati Monster 1100, Monster 1200, 749/999/848/1098/1198/899/959/1199/1299/PanigaleV2/PanigaleV4, V4S, V4R/Streetfighter 848/1100/V4/Diavel/Multistrada1200/MultistradaV4.V4S.V4Ssport.V4PIKES PEAK/MultistradaV2.V2S KL031

Description: Bonamici Racing Aluminium Clutch Lever Ducati Monster 1100, Monster 1200, 749/999/848/1098/1198/899/959/1199/1299/PanigaleV2/PanigaleV4, V4S, V4R/Streetfighter 848/1100/V4/Diavel/Multistrada1200/MultistradaV4.V4S.V4Ssport.V4PIKES PEAK/MultistradaV2.V2S LC061

Description: Bonamici Racing Aluminium Rearsets Ducati 848 / 1098 / 1198 2007-2011 D1098

Bonamici Rearsets are made from a single piece of billet aluminium in their factory based in Italy, with a black anodised finish for corrosion resistance and durability. These Rearsets are incredibly high quality. To ensure compatibility, Bonamici laser scan each and every bike they manufacture parts for in order to ensure fitment, after this their parts are fine tuned, tested and validated through various levels of Motorsport meaning you can have complete confidence in these Rearsets to transform your Ducati! These Rearsets allow you to decide where you would like the footpegs to be mounted, featuring multiple different mounting positions you can rest assured that these Rearsets will improve the handling, comfort and appearance of your SBK 848 / 1098 / 1198!

Description: Bonamici Racing Fuel Tank Cap Ducati 748/916/996/998/848/1098 FC010

This Fuel Cap has been designed by Bonamici to directly replace the OEM Fuel Cap component on Ducati Superbikes, allowing you to have faster fueling times, drastically helping in something like a pit lane environment. This Fuel Tank Cap kit is perfect for either a Trackday Warrior or even your Fair Weather Rider! Manufactured from Billet Aluminium and treated to an anodized surface finish, you can rest assured that this Fuel Tank Cap Kit will withstand the harshest of conditions while looking amazing at the same time!

Description: Bonamici Racing Aluminium Ducati 848/1098/1198 OIL CAPS M19.5x2.5 T003

This Oil Filler Cap from Bonamici has been developed to be a direct replacement to the OEM Component supplied on Ducati's. This cap is manufactured out of Billet Aluminium and features a surface anodisation in various colours to ensure this filler cap will last the test of time.
Not only does this Oil Filler Cap look amazing once installed, it allows you to easily un-screw the cap to top up your oil.

Description: Brembo Caliper Set, P4 30/34mm, GP4-RB, 2-Pin, Billet 2-Piece, 100mm Radial Mount, Hard-Anodized Black 220B47330

Item Summary
2 x 30mm & 2 x 34mm aluminum pistons
100mm radial mount
Anti-chatter clip for brake pad
HH sintered brake pads included

Description:

Floating, Black Carrier, Ducati

Derived from the experience gained in SBK and MotoGP, the brand new T-Drive disc is the natural technical evolution of latest generation Brembo competition brake discs. The special shape of the 8 “T” pins on the disc and the eight shapes on the braking torque dragging system housing are the innovative element which strongly differentiates the new T-Drive from discs with cylindrical bushing systems. In fact, as a result of specific studies into process and machining tolerances, this unique configuration transfers braking torque more effectively, providing improved resistance to thermo-mechanical stress, especially in extreme conditions of use such as racing.
The connection between housing and rotor is ensured by a special guillotine hooking system (patent pending) which allows both radial and axial floating and reduces the overall weight of the disc, resulting in a significant advantage in terms of rideability compared to the traditional bushing system. Both performance consistency and the efficiency of disc and brake pads coupling during the running-in period have been significantly improved thanks to a rotor - in steel identical to that used for the discs in SBK and MotoGP - characterised by a new differentiated diameter hole pattern. The rotor height has also been optimised: maintaining a thickness of 5.5 mm, the height could be reduced to the advantage of containing weight and the moment of inertia with the consequential benefit of improved vehicle handling.
The housing is black anthracite anodised like latest generation racing discs. The Brembo logo is on the housing, machined from billet and painted in an unmistakeable red, yet another distinctive sign that characterises the racing image. All of the Brembo “T-Drive” discs can also boast the approval of the renowned TUV Certification Body which means they can be used on public roads in all countries that recognise this certification.
The T-drive discs are available both with the same diameter as the original discs, to which they are totally interchangeable, as well as with greater diameter, for which the appropriate spacers must be purchased separately. For more information please contact your local dealer.