Nextie Standard AM carbon rim
The AM is Nextie's Standard-edition all-mountain rim: full Toray T700 carbon, a 34mm inner width for 2.4 to 2.6in tires, at 475 grams. It is the least expensive Nextie mountain rim we offer, with a two-year warranty.
Nextie designs and molds the rim; ProWheelBuilder is an independent wheel builder in Georgia, not the manufacturer. We build it into a complete wheel: pick the hub, spokes, nipples and lacing in the configurator and it ships laced, tensioned and trued.
Who it is for
The AM is for trail and all-mountain riders who want carbon's stiffness and dent resistance without paying for the last few grams. The wide 34mm bed gives a big trail tire a square profile and good support at low pressure, and it suits plus-size tires up to 3.2in. Drilled 28 or 32 holes, rated for a 136kg maximum system weight.
Sizes, weights and prices
1 size, in 29in / 700c, 27.5in / 650b, 26in, drilled 28h, 32h. Rim weights are Nextie's published figures; ERD is the effective rim diameter we cut spokes to, listed per wheel size.
| Size | Wheel | Inner width | Depth | ERD | Weight | Tire range | Drilling | Rim price |
|---|---|---|---|---|---|---|---|---|
| AM 40 | 29in / 700c | 34mm | - | - | 475g | 2.2-3.2in | 28, 32 | $250 |
| AM 40 | 27.5in / 650b | 34mm | - | - | 475g | 2.2-3.2in | 28, 32 | $250 |
| AM 40 | 26in | 34mm | - | 450 | 475g | 2.2-3.2in | 28, 32 | $250 |
How it compares
The Standard DH is the thicker downhill layup. If weight matters more than price, the Premium VM and the Supreme Omega 36 are lighter at 30mm inside.
What the designations mean
Standard, Premium and Supreme
Nextie builds every rim in one of three editions. The mold is the same; the carbon grade, the spoke-bed process, the tolerances and the warranty step up with each tier.
| Standard | Premium | Supreme | |
|---|---|---|---|
| Carbon fiber | Full Toray T700 | T700 with high-modulus T800 | T800 with ultra-light T1000 |
| Spoke bed | Standard layup | Independent mold for consistent spoke-hole thickness | Advanced Single-Point independent mold |
| Roundness / flatness | within 0.25mm | within 0.20mm | within 0.15mm |
| Factory warranty | 2 years | 3 years | 5 years |
| Built for | Reliable, cost-effective baseline | Balanced stiffness, deflection control and weight | Minimum weight with maximum impact resistance |
Tier specifications as published by Nextie.
Series codes
Every size in the list carries Nextie's own series code. Road and gravel codes are width classes, which set the tire size and the aero profile; MTB codes are duty cycles.
| Standard | Standard is Nextie's baseline edition: full Toray T700 carbon, the standard spoke-bed layup, roundness and flatness within 0.25mm, and a 2-year factory warranty - reliable and cost-effective. |
|---|---|
| AM / DH | Standard MTB (26in) duty codes: AM = all-mountain / trail, DH = downhill. |
Material and construction
The Nextie Standard AM is molded from carbon fiber in Nextie's Xiamen factory, in a UD (unidirectional) weave with a matte finish. Standard is Nextie's baseline edition: full Toray T700 carbon, the standard spoke-bed layup, roundness and flatness within 0.25mm, and a 2-year factory warranty - reliable and cost-effective. The bed is tubeless-ready. Nextie rates this rim for a maximum system weight of 136Kg (rider plus bike and gear).
How Nextie tests the Standard AM
Nextie publishes its own lab results rather than a marketing line. Rims are impact-tested on a drop hammer to the UCI wheel-approval protocol and beyond it (a weighted hammer dropped onto the built, tensioned wheel until the rim fails, the energy recorded in joules), checked for positive and lateral stiffness under load, pulled to destruction at the spoke hole, measured for runout and roundness as a built wheel, and heat-soaked at 80°C for four hours. Every edition also carries a roundness and flatness tolerance, an ASTM riding-condition rating, a maximum system weight and a factory warranty, listed below.
Standard mountain rims are full Toray T700 in the same molds as the Premium and go through the same factory inspection: roundness and flatness within 0.25mm, an ASTM condition 4 rating for the all-mountain and downhill layups, a maximum system weight of 132kg for all-mountain use, 100 to 130kgf spoke tension and a two-year warranty. Nextie does not publish a separate impact figure for the Standard edition; the layup is the thicker of its two 26in mountain rims.
Certifications
The UCI's wheel approval procedure is the only independent certification that exists for bicycle rims: a wheel built on the rim is impact-tested and inspected under the UCI's protocol before it may be raced in UCI-sanctioned road, cyclocross and gravel events, and the certificate is published. Nextie has held UCI approval since September 2021 and adds models each year; it also states that its factory holds SGS test certification and industry production-system certifications, and it rates every rim to an ASTM riding-condition class.
UCI wheel approval applies to road, cyclocross and gravel racing, not mountain biking; the approvals below are Nextie's road and gravel certificates, from the same factory and test lab.
- NXT45RC Premium road rim — UCI wheel approval, September 2021 (certificate PDF)
- Alpha 50 Supreme road wheel — UCI wheel approval, 8 October 2025 (certificate PDF)
- Alpha 40 Supreme road rim — UCI wheel approval, 29 May 2026 (certificate PDF)
- Alpha 45G Supreme gravel rim — UCI wheel approval, 21 July 2026 (certificate PDF)
- Alpha 55G Supreme gravel rim — UCI wheel approval, 21 July 2026 (certificate PDF)
Source documents on nextie.com:
Figures, certificates and media are Nextie's own, published on nextie.com; ProWheelBuilder builds the rim into a wheel and does not run these tests.
Weight
Nextie lists this rim at 475g. Rim weight is rotating weight at the outside of the wheel, so a gram saved here is felt more than a gram saved on the frame. The 34mm inner width decides the tire.
Value
The AM costs about what a premium alloy rim does and outlasts it, because carbon does not dent on a rock strike the way alloy does. Built here on the hub you choose, it turns a trail bike onto carbon for less than most riders expect.
How we build it
Choose the size, the wheel diameter and a drilling (28h, 32h), and the configurator only offers hubs, spokes and lacing patterns that can actually be built with that combination. Start a build with the Nextie Standard AM and the Custom Wheel Program opens with this rim already selected; from this page, the Build button carries the size, drilling and diameter you picked straight into the build. You can also send us a rim you already own with the supply-your-own option.
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.
Warranty
Manufacturer's warranty. Nextie warrants this product against defects in materials and workmanship. The duration, conditions and claim process are set by Nextie and can change without notice, so ask us and we will confirm the current terms before you buy.
ProWheelBuilder. If we lace this into a wheel for you, that wheel also carries ProWheelBuilder's own one-year warranty, which covers broken spokes regardless of cause and all wheel-related labor, including truing and rebuilding, for a year from purchase. Where a rim or hub is covered by its maker, we make the manufacturer's claim for you and coordinate it; where it is not, we offer an eligible replacement rim or hub at 25% off current retail. Shipping to and from us is the customer's. This cover does not extend to wheels built from components you supply yourself.
Full terms are on our Policies & Warranty page.
Nextie Standard AM questions
What tires fit the AM?
Nextie lists 2.2 to 3.2in. The 34mm bed is at its best with 2.4 to 2.6in trail tires and also takes plus tires.
What is the difference between Standard and Premium?
Standard is full Toray T700 carbon in the standard spoke-bed layup with roundness and flatness held to 0.25mm and a two-year warranty. Premium mixes in high-modulus T800, uses an independent spoke-bed mold, holds 0.20mm and carries a three-year warranty.
Is ProWheelBuilder the manufacturer of the Nextie Standard AM?
No. Nextie designs and manufactures the rim. ProWheelBuilder is an independent custom wheel builder in Georgia: we buy the rim from Nextie and build it into a finished wheel to your spec.
Can I buy the Nextie Standard AM on its own?
No. We supply Nextie rims only as part of a wheel we build, so every rim is laced, tensioned and trued here before it ships.
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 which size? 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.
