What the forums say about Xiamen CarbonSpeed (XMCS)
Xiamen CarbonSpeed (XMCS) is a vertically integrated Chinese manufacturer based in Xiamen that produces its own hubs, rims and frames, and sells largely direct to customers through founder Peter Xu and a small sales team via WhatsApp, email and a webshop. Ordering is informal and relationship-driven: buyers message Peter or Allen directly, negotiate specs and finishes, and pay by PayPal, bank transfer or proforma invoice, with a separate EU-facing site (xmcs.nl) selling only complete builds. Lead times have been the most variable aspect, ranging from about a week to over 90 days, with recurring delays from holidays, hub availability, mold supplier problems and rapid scaling; communication is praised when it happens but repeatedly criticised as slow or missing, especially by email. Build quality and finish are generally rated high and on par with premium Western brands, customisation is unusually extensive (paint, decals, layups, spokes, hubs, finishes), and pricing is widely seen as excellent value. Warranty handling is a standout strength: Peter repeatedly replaced or repaired wheels, hubs and rims, sometimes covering mechanic costs, though quality control has been inconsistent on some batches and a few customers remain unresolved.
Pros
- Peter and Allen are repeatedly praised for responsive, knowledgeable, patient communication via WhatsApp, often answering within an hour and keeping buyers informed through delays.123
- Warranty and problem handling are consistently strong: replacements were sent for lost, damaged, untrue or defective wheels and hubs, sometimes with costs covered without being asked.45
- Build quality and finish are widely reported as excellent, with wheels arriving true and round, clean BB threads and aligned brake mounts on frames, and durability after thousands of kilometres.678
- Pricing is considered excellent value, often hundreds cheaper than comparable Western or CRW wheelsets, with strong price-to-specs ratios.91011
- Customisation is unusually extensive: rim depth and width, layup (T800/T1100/UL), spoke type and count, hubs, ratchets, bearings, freehub, finishes, decals and frame paint colours.121314
- Shipping is often fast, with many orders delivered in roughly 2-4 weeks and some in under 10 days, and duty pre-paid options avoid customs surprises.11516
- The company is vertically integrated, producing its own hubs, rims and frames in-house with ISO-standard testing, which supports quality and customisation claims.17
Cons
- Communication is frequently slow or unanswered, especially by email, with replies taking days or never arriving and customers having to chase via multiple channels.181920
- Lead times are inconsistent and sometimes much longer than quoted, with delays from holidays, hub availability, mold supplier problems and scaling, pushing some orders past 90 days.212219
- Quality control has been inconsistent on some batches: wheels arrived out of true, with rim wobble, scratched logos, dents, mismatched ratchets or hub play and grinding.23511
- Early wheelsets used non-self-securing nipples, causing loose spokes and nipples; this is acknowledged and addressed with self-locking nipples and free replacements.24
- Published technical documentation is limited, with no hub or spoke dimension charts, which some buyers see as a barrier to custom ordering.2526
- The webshop and contact channels have been confusing or unreliable: two websites, a site that does not work on some desktop browsers, and a period when PayPal was frozen and only bank transfer was accepted.272128
- Packaging has been described as flimsy, with some wheels arriving scratched or boxes damaged in transit.2011
Key Facts
- Ordering is handled directly with Peter Xu or Allen via WhatsApp or email, with payment by PayPal, bank transfer or proforma invoice; the EU-facing xmcs.nl site sells only complete builds.291314
- Peter's WhatsApp is +86 182 5080 8148 and contact details are on xmcarbonspeed.cc.1310
- Typical quoted lead times are around 15-20 working days for wheels plus 10-18 days shipping, and 30-50 days for frames plus 10-20 days shipping, but actual times have ranged from about a week to over 90 days.101321
- The company operates four facilities in Xiamen (offices, hub factory, rim factory, frame factory) and produces hubs, rims and frames in-house, including OEM work for other brands.17
- Frames are monocoque molded with Toray T1000/40T/30T carbon and Mitsubishi SCM material and carry a 5-year warranty; new light hubs and rims carry a 3-year warranty.24
- Customisation includes frame paint to a supplied Pantone/YS code, branded or unbranded frames, decal styles, rim finishes (UD paintless, matte, gloss), spoke types and counts, hub models, ratchet tooth count and freehub standard.141312
- Duty pre-paid shipping is offered for some destinations, including the US and EU, avoiding customs surprises; other destinations may owe import VAT and duties.163013
- The company exhibits at Taipei Cycle Show, Sea Otter Classic and Eurobike, and used Sea Otter to launch its premium frame range.1713
Sources
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Xiamen CarbonSpeed (XMCS) factory tours & brand videos on YouTube
00:17:55
MyBikeParts
This Carbon Wheel Factory Builds Its Own Hubs - And a Frame You Haven’t Seen Before | Peter Xu XMCS
February 25, 2026
The video is a factory tour of Xiamen CarbonSpeed (XMCS) in Xiamen, China, hosted by founder Peter Xu. It reveals the company's engineering-first approach, showcasing in-house production of hubs, rims, and frames, including a new 2026 racing frame with proprietary technology. The tour emphasizes transparency, reliability, and rigorous ISO-standard testing.
Watch on YouTubeNews & Media Coverage for Xiamen CarbonSpeed (XMCS)
Bike part reviews of Xiamen CarbonSpeed (XMCS)
Crank 1
Rims 1
Wheels 16
| Name | Weight | Internal Rim Width | Brake Type | Freehub Body | Spoke Model | Hub | Reviews | Price | Added | |
|---|---|---|---|---|---|---|---|---|---|---|
 | 26 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | HS606 | $1,100.00 | 1m | ||||
 | 1375g | 21.4 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | Sapim CX-Ray | Carbon Speed R280 straight-pull | $525.00 | 1m | ||
 | 1170g | 24 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | XMCS-TS02 titanium | R248 titanium colour in-house | 4 | $1,800.00 | 1m | |
 | 1235g | 32.5 mm | Disc (Center Lock) | Shimano HG, SRAM XDR, Shimano MicroSpline | R248 / 506 / M306 Boost | 2 3 2 | $960.00 | 7m | ||
 | 1190g | 21.4 mm | Rim Brake | Shimano HG, SRAM XDR | 3.8mm carbon spokes | Carbon Speed in-house 20/24H straight-pull | $850.00 | 1m | ||
 | 21.4 mm | Rim Brake | Shimano HG, SRAM XDR | CX-ray | Carbon Speed in-house hubs | $640.00 | 1m | |||
| 1140g | 26 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | 3.8mm / 5.0mm carbon spokes | Carbon Speed 506 straight-pull | 1 6 1 | $940.00 | 1m | |
| 1085g | 24 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | 3.2mm / 5.0mm super light carbon spokes | Carbon Speed in-house 16/18H straight-pull | 1 1 1 | $930.00 | 1m | |
| 1020g | 26 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | 3.2mm / 5.0mm super light carbon spokes | Carbon Speed in-house 16/18H straight-pull | 3 1 1 | $940.00 | 1m | |
 | 1495g | 37 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | Carbon Speed titanium spokes | R248 | $930.00 | 7d | ||
 | 1245g | 24 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | Sapim CX-Ray | Carbon Speed R280 straight-pull | $635.00 | 1m | ||
 | 1035g | 26 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | 3.2mm super light carbon spokes | Carbon Speed 606 / HS606 ultralite straight-pull | 1 1 | $1,140.00 | 1m | |
 | 1275g | 21.4 mm | Disc (Center Lock) | Shimano HG, SRAM XDR, SRAM XD, Shimano MicroSpline | Carbon Speed in-house 54T ratchet hubs | $669.00 | 1m | |||
 | 1239g | 26 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | Carbon Speed in-house 20/20H straight-pull, titanium colour | $820.00 | 1m | |||
 | 1385g | 28 mm | Disc (Center Lock) | Shimano HG, SRAM XDR, Shimano MicroSpline | Sapim CX-Ray | DT Swiss 180 or Carbon Speed R280 straight-pull | $590.00 | 1m | ||
 | 1310g | 26 mm | Disc (Center Lock) | Shimano HG, SRAM XDR | Sapim CX-Ray | R280 | 1 | $590.00 | 1m |
Handlebar 4
| Name | Weight | Handlebar Type | Width, Hood-to-Hood | Reach | Drop | Material | Computer Mount | Compatibility | Reviews | Price | Added | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
 | 355g | Integrated Cockpit (one-piece) | 77 mm | 123 mm | Carbon | Integrated, sold separately | Headset spacers: Standard FSA ACR, Addict, Allez Sprint, BMC SLR/TMR, C64/V3RS, C68/V4RS, Factor Ostro 2.0/O2, Madone Gen7/Gen8, Venge, Orca Aero, Pinarello, Propel, Quick Pro ER One, R5/Soloist, Reacto, Scott Foil, Seka Spear, SuperSix EVO3/EVO4, Tarmac SL7/SL8, Tavelo Arow, V5RS, Wilier, XDS AD8/AD9, XDS RS8/RS9 | 1 | $330.00 | 29d | ||
 | Integrated Cockpit (one-piece) | 72 mm | 105 mm | Carbon | Integrated, sold separately | Headset spacers: Standard FSA ACR, Addict, Allez Sprint, BMC SLR/TMR, C64/V3RS, C68/V4RS, Factor Ostro 2.0/O2, Madone Gen7/Gen8, Venge, Orca Aero, Pinarello, Propel, Quick Pro ER One, R5/Soloist, Reacto, Scott Foil, Seka Spear, SuperSix EVO3/EVO4, Tarmac SL7/SL8, Tavelo Arow, V5RS, Wilier, XDS AD8/AD9, XDS RS8/RS9 | $330.00 | 29d | ||||
 | Integrated Cockpit (one-piece) | 72 mm | 105 mm | Carbon | Integrated, sold separately | Stem angle -8°, uplift 25 mm. Standard FSA ACR headset spacer; brand-specific spacers available (e.g. ADDICT, BMC SLR/TMR, Colnago C64/C68/V3RS/V4RS/V5RS, Factor Ostro, Trek Madone Gen7/8, Giant Propel, Merida Reacto, Scott Foil, Specialized Tarmac SL7/SL8/Venge/Allez Sprint/Supersix EVO3/4, Orbea Orca Aero, Pinarello, Quick Pro ER One, Cervelo R5/Soloist, SEKA Spear, Tavelo Arow, Wilier, XDS AD8/AD9/RS8/RS9). Designed for XMCS GRT. | $330.00 | 29d | ||||
 | 346g | Integrated Cockpit (one-piece) | 77 mm | 130 mm | Carbon | Integrated, sold separately | Standard FSA ACR, ADDICT, Allez Sprint, BMC SLR, BMC TMR, C64/V3RS/V3, C68/V4RS, Factor Ostro 2.0, Factor Ostro O2, Madone Gen7, Madone Gen8, Venge, Orca Aero, Pinarello, Propel, Quick Pro ER One, R5/Soloist, Reacto, Scott Foil, Seka Spear, SuperSix EVO3, SuperSix EVO4, Tarmac SL7, Tarmac SL8, Tavelo Arow, V5RS, Wilier, XDS AD8/AD9, XDS RS8/RS9 | 1 | $330.00 | 8m |
Frame 5
| Name | Weight | Reviews | Price | Added | |
|---|---|---|---|---|---|
 | 1000g | 1 | 525,00 $ | 8m | |
 | 895g | 2 1 | 1 200,00 $ | 9m | |
| 1070g | 2 2 | 1 490,00 $ | 8m | |
| 930g | 4 2 1 | 1 650,00 $ | 5m | |
 | 5m |