The CS-D50CU-33 disc brake 50mm depth carbon road rim from Xiamen Carbon Speed is consistently praised for its exceptional value, lightweight construction, and modern wide rim profile. Reviewers highlight its performance in crosswinds and responsiveness, though some note comfort trade-offs due to stiffness and a less polished ordering process. Overall, it is considered a top-tier budget carbon wheelset option.
Pros
- Lightweight construction (under 1,200g for the pair in some builds, ~1,400g in others).12
- Modern wide rim profile (26mm internal, 34mm external) improves aerodynamics and tire support.12
- Carbon spokes and ceramic bearings (optional) reduce weight and rolling resistance.12
- Stable in crosswinds, with good control even in high winds.1
- Responsive acceleration and power transfer due to stiff construction.21
- Excellent value for money compared to other Chinese brands and major OEMs.12
- Customizable options (depth, decals, finish) allow personalization.1
- Tubeless setup is straightforward with common tire and sealant combinations.23
- Durable performance over several months of mixed road and gravel use.12
- Hubs feature a 54-tooth star ratchet with a pleasant sound.21
Cons
- No tubeless rim tape applied from the factory.1
- Bearings and hub internals could use more grease from the factory.1
- Custom order process requires patience (7-10 days production plus shipping).1
- Supplier (Shaman Carbon Speed) is not the most consumer-friendly or polished brand; ordering is via WhatsApp, not a dedicated storefront.2
- Warranty (1-year) results may vary.2
- Stiffer T1100 carbon trades some comfort (can feel harsher).2
- Long-term durability not fully tested (only 3 months of use in one review).1
- Potential durability concerns for heavier riders with ultra-light wheels.4
Key Facts
- Claimed weight around 1,178-1,400g for a 50mm deep set, with one measured at 1,335g for a wider gravel version.123
- Rim dimensions: 50mm depth, 34mm external width, 26mm internal width (hooked rim design).12
- Uses T1100 carbon fiber, straight-pull carbon spokes, and in-house hubs with 54-tooth star ratchet.21
- Hub options include Shimano/SRAM XDR, with ceramic or steel bearings available.12
- Price around $850 USD for the wheelset, with direct factory ordering via WhatsApp.12
- Tubeless compatible, with easy setup reported using various tires and sealants.23
- Customizable decals and finishes are available from the factory.1
- One user measured tire widths expanding from 39.6mm to 43.6mm on a 40mm tire when mounted on these rims.3
Reviews & Ratings
09:48The 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.
18:34The 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.
07:16The 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.
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!
Patty30Patty30Where to Buy
CS-D50CU-33 disc brake 50mm depth carbon road rim 33mm wide clincher&Tubeless ready
CS-D50CU-33 Disc brake carbon road / gravel rim
XMCS 26mm IW 50mm depth T1100 carbon 700C road/gravel bike wheelsets with 24/24H in-house hubs and Sapim CX-Ray spokes
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