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)
- Excellent at holding momentum above 35 km/h
- Very responsive acceleration and power transfer
- Stiff construction
- Easy tubeless setup with Continental GP5000 STR tires
- Hooked rim design (preferred by reviewer)
- Uses T1100 carbon fiber (marketed as stiffer/lighter)
- Hubs come with a 54-tooth ratchet (not too loud, sounds great)
- Straight-pull carbon spokes
- Good communication and service from the supplier
- Fast production and shipping (ready in 2 weeks, received within a month)
- Arrived in perfect condition
- Specs edge out other Chinese brands like Elite Wheels, Far Sports, Wind Space
- Future-proof due to wide rim trend
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
- Stiffer T1100 carbon trades some comfort (can feel harsher)
- Requires willingness to communicate and research
- Buying internationally via channels like WhatsApp or AliExpress may not be for everyone
Key Points
- Brand: Shaman Carbon Speed (positioned as an OEM supplier)
- Depth: 50mm
- Internal Width: 26mm
- External Width: 34mm
- Weight: Approximately 1400g
- Carbon Fiber: T1100
- Rim Type: Hooked
- Hubs: In-house DT Swiss style ratchet, 54-tooth ratchet included
- Spokes: Straight-pull carbon spokes
- Bearings: Reviewer opted for steel (ceramic was an option)
- Tire Setup: Used with 30c Continental GP5000 STR (blows up to ~32mm)
- Tire Pressure: Runs about 55 PSI for comfort
- Use Case: Road, light gravel trails
- Order Method: Contact via WhatsApp, custom logos possible for a fee
- Production Time: 2 weeks
- Warranty: 1-year stated
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
- Ceramic bearings
- Star ratchet hub engagement
- Customizable decals and finishes
- Stable in crosswinds
- Responsive under pedaling
- Fantastic value at $850 USD
- Direct factory ordering reduces costs
- Tubeless compatible
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
- Carbon spokes
- Ceramic bearings
- 54-tooth star ratchet hub
- Shimano/SRAM XDR hub options
- 1,178g total weight
- $850 USD price
- Customizable decals and finishes
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
- Good crosswind control
- Aerodynamically optimized
- Customizable options (depth, decals, finish)
- Good value for money ($850 USD)
- Durable performance on gravel and road
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
- 54-tooth Star ratchet design
- 26mm internal width, 34mm external width
- Under 1,200g weight
- Aerodynamically optimized for wider tires
- Good crosswind control
- Customizable options available
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)
- Positive customer service experience with XMCS
- Versatile setup for road and light gravel use
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
- Higher cost for premium hub upgrade with minimal weight savings
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
- Tires: Specialized Pathfinder 38mm (winter), Pirelli P Zero 40mm (summer)
- Rider: 183cm, 85kg, intended for 80% road/20% gravel use
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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