
CP7855 - Bearing Mounted Master Cylinder
A high efficiency single circuit, short put type master cylinder.
Fixed through a spherical bearing and with a one-piece piston / push rod it offers a significant improvement in efficiency over traditional cylinder designs.
Ranging from 14mm to 7/8" with 30mm stroke and 15/16" to 1.00" with 28mm stroke.
Features:
- Hard Anodised Aluminium Alloy Body
- Compact design
- Bearing Mounted
- Ø6.35 (1/4") Bore
- Extra short travel to cut-off as standard
- One piece piston and push rod
- Full range of 10 bore sizes
- Rubber boots fitted as standard
- Replacement for:
- CP5855
- CP5511
- CP4411
Master Cylinder Identification:
All AP Racing master cylinders have their part number nominal bore size laser marked on the body together with batch codes enabling full manufacturing traceability. All master cylinders also have a coloured tie wrapped around the body for quick visual identification of bore size.
Technical Details:
| Weight | 0.169 - 0.198Kg (0.37 - 0.44lbs) |
| Full Stroke | 25.40mm (1.00") |
| - 14mm to 7/8" Bores | 30mm (1.18") |
| - 15/16" to 1.00" Bores | 28mm (1.10") |
| Travel to Cut-off | 0.48mm - 0.63mm (0.19" - 0.25") |
| Hydraulic Thread | |
| - Inlet | 7/16" x 20 UNF |
| - Outlet | 3/8" x 24 UNF |
| Push Rod Threads | |
| - PRTE | 5/16" x 24 UNF |
CP7855 Part Numbering
Available Bore Sizes |
Cable Tie Colour |
5/16" Push Rod |
Repair Kit |
| 14.0mm | BLACK & ORANGE | CP7855-88PRTE | CP7855-88RK |
| 15.0mm | BLACK & RED |
CP7855-89PRTE |
CP7855-89RK |
| 15.9mm | (0.625") | 5/8" | BLACK |
CP7855-90PRTE |
CP7855-90RK |
| 16.8mm | BLACK & YELLOW |
CP7855-905PRTE |
CP7855-905RK |
| 17.8mm | (0.700") | BLUE |
CP7855-91PRTE |
CP7855-91RK |
| 19.1mm | (0.750") | 3/4" | GREEN |
CP7855-92PRTE |
CP7855-92RK |
| 20.6mm | (0.812") | 13/16" | ORANGE |
CP7855-93PRTE |
CP7855-93RK |
| 22.2mm | (0.875") | 7/8" | RED |
CP7855-94PRTE |
CP7855-94RK |
| 23.8mm | (0.937") | 15/16" | WHITE |
CP7855-95PRTE |
CP7855-95RK |
| 25.4mm | (1.00") | YELLOW |
CP7855-96PRTE |
CP7855-96RK |
Installation Drawing

Additional Parts
Description |
Part Number |
Image |
| 7/16" UNF Inlet Push-on Adaptor kit for Ø5/16" Hose | CP2623-30 | |
| 7/16" UNF Inlet Push-on Banjo Adaptor kit for Ø5/16" Hose | CP2623-41 | |
| Ø5/16" EPDM Hose |
|
|
| Length - 12" | CP6614-103 |
|
| Length - 24" | CP6614-106 |
|
| Length - 72" | CP6614-102 |
|
| Fluid Reservoirs |
|
|
| Remote Fit - 7/16" UNF - Short | CP4709-13 | |
| Remote Fit - 7/16" UNF - Medium | CP4709-14 | |
| Remote Fit - 7/16" UNF - Tall | CP4709-15 |
| Brand | AP Racing | |
|---|---|---|
| Option | SKU | Barcode |
| 14.00mm | CP7855-88PRTE | |
| 15.00mm | CP7855-89PRTE | |
| 15.90mm | (.625") | 5/8" | CP7855-90PRTE | |
| 16.80mm | CP7855-905PRTE | |
| 17.80mm | (0.70") | CP7855-91PRTE | |
| 19.10mm | (0.75") | 3/4" | CP7855-92PRTE | |
| 20.60mm | (.812") | 13/16" | CP7855-93PRTE | |
| 22.20mm | (.875") | 7/8" | CP7855-94PRTE | |
| 23.80mm | (.937") | 15/16" | CP7855-95PRTE | |
| 25.40mm | (1.00") | CP7855-96PRTE | |




