These 50mm deep carbon road rims offer exceptional value with modern wide profiles, lightweight construction using high-grade carbon, and customizable options, though they require direct ordering and may trade some comfort for stiffness.
Pros
- Lightweight (under 1,200g for some sets)
- Modern wide rim design (26mm internal/34mm external)
- Carbon spokes and ceramic bearings
- Good crosswind control and aerodynamic optimization
Cons
- Long-term durability not fully tested
- No tubeless rim tape applied from factory
- Bearings and hub internals could use more grease
- Custom order process requires patience (7-10 days production plus shipping)
Key Facts
- 50mm rim depth
- 26mm internal width, 34mm external width
- T1100 carbon fiber construction
Reviews & Ratings
The reviewer discusses a custom set of carbon road bike wheels ordered from Shaman Carbon Speed, which is likely the company 'Xiamen Carbon Speed' referenced in the part name. They state the wheels are 50mm deep, have a 26mm internal width and 34mm external width, and weigh approximately 1,400g. The reviewer highlights the exceptional value, wide rims, light weight, and performance in holding momentum and accelerating. They mention the wheels are made from T1100 carbon fiber, come with in-house DT Swiss style ratchet hubs with a 54-tooth ratchet, and are laced to straight-pull carbon spokes. The ordering process was via WhatsApp, and the wheels arrived within a month. After a year of use, the reviewer is impressed, though notes a trade-off in comfort due to stiffness.
AI Summary
Pros
- Exceptional value for money
- Wide rims (26mm internal, 34mm external)
- Light weight (~1400g for a 50mm deep set)
more pros in the video
Cons
- Supplier (Shaman Carbon Speed) is not the most consumer-friendly or polished brand
- Ordering is factory-direct via WhatsApp, not a dedicated storefront
- Warranty (1-year) results may vary
more cons in the video
Key Points
- Brand: Shaman Carbon Speed (positioned as an OEM supplier)
- Depth: 50mm
- Internal Width: 26mm
more key points in the video
The reviewer discusses the CS-D50CU-33 disc brake 50mm depth carbon road rim 33mm (Xiamen Carbon Speed) extensively throughout the video. They highlight that these rims are newly released by Carbon Speed and are among the lightest they have ever featured on their channel. The reviewer emphasizes the value proposition, noting the modern rim width profile, carbon spokes, ceramic bearings, and star ratchet hub engagement at a price point of $850 USD. They also mention the customization options available directly from the factory, including decal colors and finishes. The reviewer tested the wheels in various conditions, including high winds and rough pavement, and found them to be stable and responsive.
AI Summary
Pros
- Lightweight (under 1,200g for the pair)
- Modern rim width profile (34mm external, 26mm internal)
- Carbon spokes
more pros in the video
Cons
- No tubeless rim tape applied from the factory
- Bearings and hub internals could use more grease
- Custom order process requires patience (7-10 days production plus shipping)
Key Points
- 50mm depth
- 34mm external width
- 26mm internal width
more key points in the video
The reviewer discusses their experience with Xiamen Carbon Speed wheels, specifically mentioning a 50mm depth carbon road rim model. They highlight using these wheels for several months across different terrains and frame sets, noting their performance in various weather conditions. The reviewer emphasizes the wheels' specifications, including carbon spokes, ceramic bearings, and a 54-tooth Star ratchet design. They also mention the wheels' aerodynamic optimization, durability, and value for money.
AI Summary
Pros
- Lightweight (under 1,200g)
- Modern, wide rim design (26mm internal, 34mm external width)
- Carbon spokes and ceramic bearings
more pros in the video
Cons
- Long-term durability not fully tested (only 3 months of use)
- No rapid wear test conducted
Key Points
- 50mm depth carbon road rim
- Carbon spokes
- Ceramic bearings
more key points in the video
A Reddit user shares their new custom-built road/gravel bike featuring a Waltly titanium frameset and lightweight carbon wheels from Xiamen Carbon Speed (XMCS). The discussion focuses on wheel specifications, build process, and component choices.
AI Summary
Pros
- Lightweight wheelset (1230g for 50mm depth)
- Custom titanium frame with extensive design iterations
- High-quality components (SRAM Force XPLR groupset, Chris King seatclamp)
more pros in the review
Cons
- No real-world ride feedback yet due to weather
- Some budget components (AliExpress bar tape, bottle cages)
- Potential durability concerns with ultra-light wheels for heavier riders
more cons in the review
Key Points
- Wheels: XMCS 50mm carbon rims, Sapim CX-Ray spokes, in-house hubs, 1230g total weight
- Frame: Custom Waltly titanium, $1800 including design iterations and shipping
- Groupset: SRAM Force XPLR with 50T Garbaruk chainring and 10-46 cassette
more key points in the review
Hi all,
After a bit of a delay, I’m finally sharing my first impressions of a prototype gravel wheelset from XM Carbonspeed. I had a chance to chat with Peter from XMCS at Eurobike and received the wheels at a discounted rate in exchange for providing honest feedback here.
Unboxing & Initial Impressions
• Finish: Matte satin surface, golden water-transfer logos, raw titanium spokes, black hubs and nipples – very clean, high-end look.
• Rim profile: 42 mm outer / 33 mm inner width. Looks massive at first glance, but pairs surprisingly well with 40–45 mm tires and creates a smooth aero transition.
• Build quality: Excellent. The internal finish is flawless – no carbon debris, resin residue or visible imperfections.Measured Weight (kitchen scale)
• Front: 615 g
• Rear (HG freehub): 720 g
• Total: 1,335 gThe XDR version is ~3 g lighter. Very impressive numbers for such wide rims with titanium spokes. XMCS claims T1100 carbon – which could explain the low weight, assuming durability holds up.
Tubeless Setup
• Tape: Buckless 35 mm
• Valves: Buckless aluminum
• Sealant: Schwalbe Doc Blue (60 ml front / 65 ml rear)
• Tires: Tufo Gravel Thundero – front 40 mm, rear 44 mm (both used)Setup was straightforward – both tires seated immediately with a Tyre Booster.
Measured Tire Widths (@32 psi, compared to Zipp 303s)
• Front: 39.6 mm → 43.6 mm
• Rear: 43.3 mm → 47.6 mmNext Steps
I’ll be testing them further on my custom titanium gravel bike – visually a perfect match. Ride impressions to follow soon.If you have any questions or want specific feedback, feel free to ask!
Where to Buy
XMCS 26mm IW 50mm depth T1100 carbon 700C road/gravel bike wheelsets with 24/24H in-house hubs and Sapim CX-Ray spokes
CS-D50CU-33 disc brake 50mm depth carbon road rim 33mm wide clincher&Tubeless ready
Questions about CS-D50CU-33 disc brake 50mm depth carbon road rim 33mm (Xiamen Carbon Speed)
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