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Motorcycle Parts UK

ISR Motorcycle Brake Calipers

ISR 2 Piston Radial Racing Rear Brake Caliper (22-049)
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ISR 2 Piston Radial Racing Rear Brake Caliper (22-049)

Ref: ISR2PSRR

Extremely Light - Extremely Versatile!

Beautifully carved from billet aluminium - these ultra-light radial rear calipers are available in Left-Hand or Right-Hand versions (Right-Hand version pictured) or could be used at the front (for very light bikes only - in single or twin disc configurations) with discs from 150 to 250 mm in diameter.

Because the swept height of the pads (not included) is only 27 mm, this also means HPS can produce very lightweight discs to go with these calipers (see our bespoke discs information page and downloadable ordering/quotation form here).

- Ultra-light & durable with clear anodised finish
- Tufram coated aluminium alloy pistons
- Pads NOT included

Weight per caliper (including pads): 290g
Piston diameter: 25 mm x 2
Pad area: 7 cm² x 2 = 14 cm² total
Pad track/swept height of disc: 27 mm (narrow track)
Mounting holes: Pitch/distance apart 56 mm. hole depth 27.4 mm
Mounting bolts: 8 mm diameter x 2 (not included)
Offset (mounting bolts to disc centre-line) 15 mm
Hydraulic Threads M10 x 1.25 mm (10 mm depth)

Disc size/diameter compatibility: 150 - 250 mm

Disc thickness: 4.6 - 5.0 mm

Surface finish: Clear anodised

Please note: Due to the smaller dimensions of this caliper, this will not normally be a direct replacement for your original caliper, meaning you may need to modify your your front forks / existing rear bracket, or have a new bracket / adaptors manufactured. Please contact us if you need advice regarding this.

You will be asked to confirm the make, model and year of your bike once you've added this item to your shopping cart.

Note: We also supply these calipers for race cars, click here for more information.



Choose side...

Tick to add standard organic road pads for £29.09 inc. VAT
Tick to upgrade to EBC GPFAX Professional Race Pads for £42.17 inc. VAT

Price:£254.40 (£305.28 Including UK VAT at 20%)





(Shipping costs calculated before checkout and 20% UK VAT/Sales tax will be removed for non-UK destinations)






ISR Piston Cap Removal Tool
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ISR Piston Cap Removal Tool

Ref: ISRPSTCPRT

Billet tool for removing the piston caps from your ISR caliper.

Available for 25mm, 30mm, & 34mm pistons.

IMPORTANT NOTE: To ensure you order and receive the correct piston cap tool, it is necessary for you to measure the diameter of the actual pistons inside your calipers (i.e. the pistons which are pushing against the brake pads and not use the size of the outer caps which you are trying to remove which will differ).


Size required...

Price:£53.72 (£64.46 Including UK VAT at 20%)





(Shipping costs calculated before checkout and 20% UK VAT/Sales tax will be removed for non-UK destinations)