Description
Availability: This exact Hope DH Pro 4 36H 135mm x 12mm rear hub is currently out of stock at The LBS. Availability and price can change, so check the product status before planning a wheel build.
The Hope DH Pro 4 is a rear mountain-bike hub built around a 135mm x 12mm axle format, 36-hole drilling and a standard 6-bolt rotor mount. It is intended for a narrow-range downhill cassette rather than a normal wide-range MTB cassette. The fitment details matter more than the color or engagement specification: confirm the frame spacing, axle, cassette and spoke count before ordering.
Key specifications
| Specification | Listed detail |
|---|---|
| Hub position | Rear |
| Spacing and axle | 135mm x 12mm |
| Spoke drilling | 36 hole; Hope also lists 32-hole versions in the DH family |
| Rotor interface | 6-bolt disc fitting |
| Freehub options | 7-speed Shimano steel, SRAM XD or Hope cassette options, subject to the exact configuration |
| Engagement | Four-pawl ratchet with 44 tooth engagement, listed as 8.2 degrees |
| Body material | Machined from forged 2014 T6 aluminium billet |
| Listed weight | 415g for the Shimano steel 135 x 12mm configuration |
These details are taken from the current product record and Hope’s Pro 4 DH technical document. The document is historical, so it confirms the technical configuration rather than current stock.
Will it fit your bike?
Use this checklist before treating the hub as a match:
| Check | What must match |
|---|---|
| Frame spacing | The frame must be designed for the 135mm rear-hub spacing used by this listing. |
| Axle | The frame and hub configuration must use a 12mm rear axle; do not assume a 12mm hub is interchangeable with every 135mm frame. |
| Spoke count | Your rim must be drilled for 36 spokes, and the wheel builder must calculate spoke length for this exact hub and rim. |
| Rotor mount | The brake rotor must use a 6-bolt interface and have the correct clearance for the frame and caliper. |
| Cassette | The cassette must match the selected narrow-range freehub. A conventional 10-, 11- or 12-speed wide-range cassette should not be assumed compatible. |
Hope lists separate hub shells for its different width families. The Hope hub documents page is the right place to check the relevant technical document, while the exact freehub and end-cap choice should be confirmed against the product configuration before a wheel is built.
Freehub and cassette questions
This is a DH-specific hub, so the cassette question is central. The product listing identifies options for 7-speed Shimano, SRAM XD and Hope cassette bodies. Those labels describe the available freehub configurations; they do not mean every cassette in those families will fit every build. Check the cassette’s speed, spline standard and required spacers before ordering.
Wheel-build considerations
The listing provides a 36-hole option and Hope describes larger flanges as a way to support a stiffer wheel build. That is a manufacturer design statement, not an independent measurement of stiffness. The practical consequence is that the hub must be paired with a 36-hole rim and correctly calculated spokes. A wheel builder should verify flange dimensions, spoke-hole drilling and the hub’s published offsets rather than reuse a spoke length from another Pro 4 model.
Rotor and brake fitment
The rear hub uses a standard 6-bolt rotor fitting. Confirm the rotor’s bolt pattern, bolt length and frame/caliper clearance during the build. The hub itself does not determine rotor diameter or brake compatibility: those choices depend on the frame, fork, caliper, adapter and rotor system.
Service and ownership
Hope’s documentation identifies cartridge bearings, seals, pawls and springs as service parts in the Pro 4 family. That supports a serviceable design, but it does not prove a particular service interval or bearing life. Clean the hub according to Hope’s current procedure and use the correct replacement parts for the exact DH shell and freehub.
Out of stock: what should a buyer do?
Because this exact configuration is currently out of stock, do not treat the displayed price as a live purchase quote. If you need a wheel now, compare a current hub only after checking that its spacing, axle, spoke drilling, rotor mount and cassette interface match the build. The Hope Pro 5 rear hub 135mm QR is a different configuration and is not a drop-in replacement for this 135mm x 12mm DH hub. A wheel builder should confirm the alternative before any order or spoke calculation.
Who this configuration suits
- A rider or wheel builder working with a 135mm x 12mm rear frame and a narrow-range DH cassette.
- A 36-hole wheel build that needs a 6-bolt rotor interface.
- A buyer who has confirmed the exact freehub, axle and end-cap configuration before ordering.
Who should pause before ordering
- Anyone with a 142mm, 148mm Boost or 157mm frame who has not confirmed the correct hub shell.
- Anyone building around a wide-range cassette without checking the freehub and spacer requirements.
- Anyone with a 32-hole rim; this listing is the 36-hole version.
- Anyone who needs an immediately available hub, because this exact product is currently out of stock.
Bottom line
The Hope DH Pro 4 36H 135mm x 12mm is a specific downhill rear-hub configuration, not a general-purpose replacement for every Pro 4 or Pro 5 hub. Its strongest documented advantages are the defined DH cassette/freehub options, 36-hole build choice, 6-bolt mount and published conversion family. The main buying risk is fitment: confirm spacing, axle, cassette, rotor and spoke count together. Since The LBS currently lists this configuration as out of stock, check availability or have a qualified wheel builder validate a current alternative before ordering.
Zohar (verified owner) –
Very well worth the money.