Boyd 55 Carbon Tubeless Disc Brake Rim
The Boyd 55 Carbon Tubeless Disc Brake Rim is a carbon fiber disc tubeless rim for trail and cross-country mountain bikes. Boyd designs and manufactures the rim; ProWheelBuilder is an independent custom wheel builder in Georgia, not the manufacturer. We build it into a complete wheel: choose the hub, spokes, nipples and lacing in the configurator and it ships laced, tensioned and trued by hand.
Specifications
| Wheel size | 29in |
|---|---|
| ERD | 531.6 (29in) |
| Inner width | 22 mm |
| Outer width | 28 mm |
| Depth | 55 mm |
| Drillings | 24h, 28h |
| Weight | 530g (700c/29in) |
| Material | Carbon Fiber |
| Tire type | Clincher Tubeless Compatible |
| Brake | Disc |
| Nipples | External |
| Finishes | black |
Material and weight
A carbon fiber rim, listed by Boyd at 530g in 700c/29in. Rim weight is rotating weight at the outside of the wheel, so it is felt more than the same grams on the frame. A 22mm inner width suits road and gravel tires that want a rounder profile.
Value
Every Boyd rim we sell is built into a wheel here: we cut spokes to the measured ERD of the exact size, lace it to the hub you choose, tension and true it by hand and stand behind the build. The current per-size price is always shown live in the configurator.
How we build it
Pick the wheel size (29in), then a drilling (24h, 28h), and the configurator only offers hubs, spokes and lacing patterns that can be built with that combination. Sizes or drillings not made are struck through rather than hidden. Start from this rim in the Custom Wheel Program, or send us a rim you already own with the supply-your-own option.
Build it with us
We build this rim to order. Open the Custom Wheel Program with the Boyd 55 Carbon Tubeless Disc Brake Rim already selected and pick the parts around it; it is offered for gravel and road disc, track and road single-speed, mountain bike, MTB single-speed and fat bike builds, and the configurator will not let you assemble a combination we would not build.
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.
Boyd's testing and certifications
Boyd Cycling builds its wheels in Greenville, South Carolina, and states that its Prologue, Podium and CCC alloy rims are rolled in an in-house aluminum rim facility in Greenville, and that carbon rim production in South Carolina began in 2025 after it acquired Munich Composites, giving "the only US based supply of both carbon and aluminum rims."
Boyd publishes impact figures for its carbon rims. Boyd states the T1000-carbon Pinnacle Race gravel rim delivers "150 joules of impact resistance—on par with enduro MTB wheels," and lists "140J impact resistance, fatigue, and tire pressure testing" for the 55 Road Disc SL. BikeRadar reported the Podium 36 Disc SL rim withstands "more than 110 joules," more than 2.5 times the UCI's 40-joule requirement. Every wheel passes through five work centers with checks for true, runout and spoke tension. On the alloy CCC rim Boyd states it uses 0.7mm hooks (against a typical 1.1mm) with a thicker 1.35mm hook wall, heat-treated to T6.
Boyd's road rims are hooked and, per its FAQ, "meant for tires under 30mm and pressures above 65PSI"; gravel and mountain rims are hookless and "usually will never see tire pressures above 40PSI." All rims have a tubeless rim bed. Boyd publishes no rider weight limit.
Warranty: Boyd states a limited lifetime warranty on carbon rims from 2018 onward and a 2-year (24-month) warranty on alloy rims, excluding broken spokes and worn bearings. Any Boyd wheel owner, regardless of age, condition or place of purchase, is eligible for a reduced-price rebuild, replacement or trade-in.
Certifications
- Made in USA (alloy rims) — Boyd states Prologue, Podium and CCC alloy rims are made in its Greenville, SC alloy rim facility; wheels handbuilt in Greenville, SC (source)
- US carbon rim production — Boyd states carbon rim production started in South Carolina in 2025 following its 2024 acquisition of Munich Composites (source)
- Impact test figures (maker-stated) — Pinnacle Race 150 joules; 55 Road Disc SL 140J; Podium 36 Disc SL over 110 joules vs UCI 40 joules (BikeRadar) (source)
Sources on Boyd's site:
- Frequently Asked Questions | Boyd Cycling
- Repairs and Warranty | Boyd Cycling
- Boyd Cycling Pinnacle Race Carbon Gravel
- Boyd Cycling 55 Road Disc SL
- Boyd Cycling CCC 700c Alloy Gravel
The figures, certificates and media above are Boyd's own. ProWheelBuilder does not run these tests; our part is the wheel we build on the rim.
Warranty
Boyd's warranty. Boyd Cycling warrants carbon wheels bought new since 1 January 2018 for life against manufacturing defects and alloy wheels for three years, and runs a lifetime crash-replacement scheme that follows the wheel rather than the owner.
ProWheelBuilder. Wheels we build around this part are covered by our own one-year warranty alongside the maker's. Within the year: broken spokes replaced regardless of cause, and the labor on the wheel - truing, re-tensioning or a complete rebuild - included. A manufacturer-covered rim or hub failure is a claim we make and manage for you; one they will not cover is answered with an eligible replacement at 25% off retail. Shipping each way is yours. Parts you supply yourself fall outside it.
Full terms are on our Policies & Warranty page.
55 Carbon Tubeless Disc Brake Rim questions
Is ProWheelBuilder the manufacturer of the Boyd 55 Carbon Tubeless Disc Brake Rim?
No. Boyd makes the rim. ProWheelBuilder is an independent custom wheel builder in Georgia: we buy the rim from Boyd and build it into a finished wheel to your spec.
Is it tubeless-ready?
Yes. Boyd lists the 55 Carbon Tubeless 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.
