MyBike.parts
Brand Day On Sale!
In this video I take a detailed first look at a one piece moulded carbon road bike frame that has been gaining popularity on Chinese carbon and AliExpress style forums.
Rather than relying on marketing claims, this review focuses on engineering fundamentals. Manufacturing method, internal construction, bearing seats, bottom bracket finish, dropouts, reinforcement zones, and overall quality of execution. This frame is moulded as a single piece rather than being bonded from multiple sections, which has significant implications for strength, load paths, and long term durability.
I go through what is included with the frameset, measure the weights of the frame, fork, seatpost and hardware, and inspect the finish externally and internally. Particular attention is paid to areas where carbon frames commonly fail or are poorly executed, including headset bearing seats, T47 bottom bracket alignment, internal routing, seatpost clamp design, and rear dropout finishing.
If you are considering a direct to consumer carbon frame and want to understand how it is actually made rather than how it is marketed, this video is for you.
Subscribe for more engineering based cycling content.
*********************************************************************************************
CARBONSPEED Details:
Instagram https://www.instagram.com/xmcarbonspeed/
Frameset https://www.xmcarbonspeed.cc/products/xmcs-gran-turismo-frameset
Peter is very happy to build you something to your specifications, I'd suggest emailing him to get exactly what you want. Officially they are XM Carbonspeed but most people just refer to them as carbonspeed
*********************************************************************************************
You can support my journalistic career on Patreon
https://patreon.com/hambini
I'm also on Facebook and Instagram
https://instagram.com/hambinieng
https://facebook.com/hambinieng
Website
https://hambini.com
Discount codes:
https://www.hambini.com/hambini-bicycle-supplier-discount-codes-100-verified/
Bike part mentions in this video
FrameXM Carbon Speed XMCS Gran Turismo frameset
Created: January 20, 2026The reviewer provides a detailed analysis of the XM Carbon Speed XMCS Gran Turismo frameset. They note it is a one-piece molded frame, which is complex and expensive to manufacture, contrasting it with typical multi-piece frames that have adhesive joints. The frame arrives with a fork, handlebars, seat post, headset spacers, bearings, and other accessories. It has a nude carbon finish with clear lacquer, a T47 bottom bracket, internal routing, an oversized headset, and dropped seat stays. The reviewer highlights the clean internal construction with no visible joints, good finishing on critical interfaces, and overall solid build quality. They mention it is not as high-end as brands like Evolved Chamers and lacks some accessories like a manual, but it is also not as expensive. They plan to build and ride it for further subjective feedback.
AI-Summary
Pros
- One-piece molded construction (no adhesive joints, stronger)
- Clean internal construction with no visible joints
- Good finish on critical areas (headset seats, bottom bracket threads)
- T47 bottom bracket with good threads
- Internal routing for cables/hoses
- Oversized headset (1.5" top and bottom)
- Removable front derailleur hanger for 1X compatibility
- Reasonable length head tube for more comfortable position
- Frame weight is 987g
- Fork weight is 393g
- Seat post weight is 133g
- Fork steer tube is round and concentric
- Dropouts are flat and smooth after finishing
- Handlebar has internal routing and dimpled top
- Abundance of headset spacers included
- Overall first impressions are positive with not a lot wrong
Cons
- Nude finish makes blemishes more visible (one small speck noted on top tube)
- Not as high quality as premium brands like Evolved Chamers
- Does not come with a manual or some expected accessories
- Seat post design appears backwards (sharper end at front)
- Some filler around hydraulic line ports on fork (deemed largely unavoidable)
- Pitched as not having all the bells and whistles
Key Points
- Frame is one-piece molded, not multi-piece with adhesive joints
- Frame weight: 987g
- Fork weight: 393g
- Seat post weight: 133g
- Bottom bracket: T47 (85.5mm or 86.5mm compatible)
- Headset: oversized 1.5" top and bottom
- Handlebar: 380mm wide, 130mm drop, 77mm reach, 100mm stem, -10°, internal routing
- Seat post: wedge clamp system with two rivnuts
- Finish: nude carbon with lacquer, shows reinforcement areas
- Logo: default is XMCS, can request 'Carbon Speed'
- Dropped seat stays
- Internal routing from handlebars through frame
- Fork has long steerer tube requiring cutting