ENVE Composites M8 Rear Disc Brake Rim
The ENVE M8 is the enduro rim in ENVE's M-Series, molded in Ogden, Utah, and it is the rim where ENVE's change of philosophy shows most. The old M730 was famously stiff; the M8 is 73% more compliant, by the company's own figure, with a shallow profile that gives vertically over square-edged hits and a wide, blunt hookless bead that protects the tire. It keeps the patented molded spoke holes and comes in front- and rear-specific versions. This page covers the ENVE Composites M8 Rear Disc Brake Rim.
The M8 is not sold bare. You choose the hub and the rest of the build in the configurator, and it ships from our shop in Georgia laced, tensioned and trued by hand.
Design and construction
The M-Series rims share three ideas. The spoke holes are molded, not drilled, so the carbon fibers run unbroken around each hole and the rim keeps its strength where a drilled rim is weakest. The profile is shallow, about 20mm, which is where the compliance comes from; a deep carbon rim is stiff in every direction, and the designers decided a mountain rim should give a little vertically. And the bead wall is wide and blunt on the newest generation, which is how the company cut pinch flats and rim damage compared with its earlier rims.
How it rides
An M8 wheel is fast through rough terrain because it does not fight the trail. The compliance ENVE built in lets the rim absorb hits that used to be transmitted to your hands, and the wide bead means a 2.5in tire at low pressure survives rock strikes that would have flatted on an older rim. It is still a stiff, precise carbon wheel when you lean it into a berm.
The M8 is an enduro and aggressive trail rim. For bike park and downhill the M9 is heavier-duty; for lighter trail riding the M6.
Specifications
| Wheel size | 29in, 27.5in |
|---|---|
| ERD | 606 (29in), 568 (27.5in) |
| Inner width | 29 mm |
| Drillings | 32h |
| Weight | 725g (700c/29in), 588g (650b/27.5in) |
| Material | Carbon Fiber |
| Tire type | clincher tubeless compatible |
| Brake | Disc |
| Nipples | External |
| Finishes | black |
This listing
This is the 29in, 27.5in listing of the M8, 32h, about 725g, 29mm inside, mm deep, disc. Pick the size that matches your frame; the profile and construction are the same across the range.
The disc version of the M8 has no brake track, so the sidewall is a plain extrusion that saves a little weight and never wears; it is the one to choose for any disc-brake frame. The rim-brake version, listed separately, has a machined sidewall.
Sizes, fit and compatibility
The ENVE Composites M8 Rear Disc Brake Rim comes in the drillings listed on this page. It is a disc-brake rim. We build the M8 on the brand's own hubs, Industry Nine Hydra and 1/1, DT Swiss 350 and 240, Chris King MTB, Hope Pro 5 and Onyx Vesper hubs, usually with Sapim Race, D-Light or CX-Sprint spokes or DT Competition, and brass nipples; Sapim Strong on the drive side for e-bikes.
Tire range on the M8 is 2.4 to 2.6in, tubeless-ready tires only on the hookless bead. Give the configurator your bike type and weight; it picks a sensible spoke count and lacing pattern, which you can override.
Put it in a custom wheel
Build a custom wheel around the ENVE Composites M8 Rear Disc Brake Rim — the link drops you into our Custom Wheel Program with this rim pinned, ready for you to choose the rest. It is set up for mountain bike, MTB single-speed and fat bike builds.
Spoke head is decided by the hub, not the rim: this rim builds equally well with J-bend or straight-pull spokes, and the configurator only offers the spokes that match the hub you pick.
What ENVE Composites says about testing
ENVE makes and tests its rims in Ogden, Utah. For mountain rims it runs three drop tests, each dropping a calibrated weight onto a wheel with an inflated tire. Test 1 (since 2007) strikes both rim walls and is raised until first visible damage; ENVE requires 10 in for XC, 12 in for trail and 14 in for gravity rims. Test 2 (since 2014) strikes one rim wall to mimic pinch-flat hits, requiring 5 in (XC), 6 in (trail), 8 in (gravity) and 10 in (DH race). Test 3 (since 2021) rotates the wheel between hits so every spoke hole is struck, 100-plus impacts per rim. ENVE states the 2024 M6 improved 47% over the M630 and the M8 21% over the M730.
For hookless road rims ENVE states it has run over 1,000 tire tests in eight years. ISO 4210 requires a tire to hold 110% of its maximum pressure for five minutes (5 bar/72.5 psi for a 28 mm tire); ENVE approves a 28 mm tire only if it holds 120 psi, 165% of the ETRTO/ISO maximum.
ENVE Composites's videos
From ENVE Composites
Certifications
- UCI approved wheels — UCI list version 2024.10.02: SES 2.3 TUBELESS (24.01.2022), SES 3.4 TUBELESS and SES 4.5 TUBELESS and AG25-700C (31.01.2022), SES 6.7 TUBELESS (03.05.2022), 45 and 65 (17.06.2020), G27-700C (19.03.2021), G23-700C (05.07.2019), SES 3.4 ALL ROAD CLINCHER (08.03.2019), SES 4.5 AR and SES 5.6 variants (26.07.2018), SES 3.4 variants (21.07.2017), SES 7.8 variants (14.11.2016) (source)
- ISO 4210 tire retention (referenced) — ENVE states ISO 4210 requires holding 110% of max tire pressure for five minutes and that its own hookless approval requires 120 psi / 165% of the ETRTO/ISO 5 bar maximum for a 28 mm tire (in-house standard, no certificate) (source)
- Limited Lifetime Warranty — Rims: lifetime for original owner; hub internals and bearings 1 year; second-hand owner 5 years from date of manufacture; crash replacement 0-3 years no charge, 3+ years 30% off MSRP (source)
Sources on ENVE Composites's site:
- M Series Impact Testing 2024 - ENVE
- Why Make more Compliant Rims? - ENVE
- Hookless Rim Technology 101 - ENVE
- ENVE | WARRANTY
- Complete Terms and Conditions - ENVE Limited Lifetime Warranty
ENVE Composites publishes those results; ProWheelBuilder builds the rim into a wheel and does not test it in a lab.
Building it at ProWheelBuilder
ENVE makes the M8; ProWheelBuilder is an independent wheel builder in Georgia, not the manufacturer. Every M8 wheel we build gets spokes cut from the rim's measured ERD, is tensioned in stages with a gauge, stress-relieved and trued before it ships. Tubeless tape and a valve are fitted on request.
In the configurator you will only see parts that fit this drilling; combinations that are not made are struck through, and the price updates as you pick.
Warranty
ENVE Composites's warranty. ENVE gives the original owner a five-year limited warranty against defects in materials and workmanship, alongside its Lifetime Incident Protection program, which covers rims, forks, bars, stems, seatposts and hubs damaged in riding incidents.
ProWheelBuilder. Any wheel we build on this part carries ProWheelBuilder's one-year warranty in addition to the manufacturer's. Broken spokes are replaced for a year whatever the cause, and all wheel-side labor is included - truing, re-tensioning, rebuilding. Where the maker covers a failed rim or hub we handle that claim for you; where they decline, an eligible replacement comes at 25% off current retail. The customer covers shipping in both directions. Components supplied by the customer are not covered.
Full terms are on our Policies & Warranty page.
M8 Rear Disc Brake Rim questions
What tire width suits this rim?
At 29mm inside this is a trail width, sized around 2.1 to 2.4in tires. That is wide enough to stop a modern trail casing rolling under you in a corner without pushing the tread so flat that it wears down the middle.
Which spokes and nipples suit the M8?
For most riders a double-butted spoke such as Sapim Race or DT Competition with brass nipples; lighter riders can go to Sapim Laser or CX-Ray. The configurator recommends a gauge and count for the M8 from your bike type and weight.
Why are there front and rear versions?
ENVE tunes the layup and sometimes the width to the job each wheel does: the front for grip and compliance, the rear for stiffness and impact strength.
Is it tubeless-ready?
Yes. ENVE Composites lists the M8 Rear Disc Brake Rim as clincher tubeless compatible; we tape and fit a valve when you choose the tubeless option.
Which spoke count should I choose?
It depends on your weight, terrain and the hub, not the rim alone. The configurator recommends a count from your bike type and rider weight, within the drillings this rim is made in.
How long will the wheel take?
Build time comes down to parts availability rather than bench time. The estimated ship date is shown in the configurator before you check out.
Not sure? Text or leave a voicemail on 470-253-0929 or email info@prowheelbuilder.com — you will be talking to the people who build the wheels.
