The heiress of the world champion. Developed in the most demanding circuits, the Pro SL is the top of the brand's range. Rigid carbon frame UHM super light is pure power and efficiency.


 Frame Carbon Monocoque UHM SL
 Fork MTB Fox Float SC Factory Kashima Boost Remote 32 100mm
 Rear Derailleur Shimano XTR 12s
 Shifters MTB Shimano XTR
 Brakes MTB Shimano XTR
 Chainwheel Shimano XTR
 Piñon cassette Shimano XTR
 Wheels Massi Venom Replica Carbon Boost
 Handlebar MTB Massi MHB-105 Carbon SL
 Stem Massi MST-550 SL
 Seat Post Massi CNC Ø31.6
 Saddle Massi Prolight
 Tire Massi Rader Pro 2.20 TR
 Pedals MTB Shimano XTR


Advanced Custom Carbon Tech manufacture process is the result of more than 30 years of experience in the production of frames for the most demanding professional riders. Advanced Custom Carbon Tech manufacturing is focused on quality. All the production steps are closely monitored and always controlled by a quality control check. Traceability of all our carbon fibers is also a way to certificate the origin and the high specs of our raw materials
UHM Unidirectional
Unidirectional carbon layers with an optimized strength-weight ratio to achieve the maximum frame rigidity. Toray UHM layers meet the toughest fatigue resistance tests and ensure the excellent level of reliability of all our frames.
SL Superlight
An exclusive mix of carbon and resin during the lay-up process achieves an amazing lightness of our higher range frames. This know-how belongs to Massi and it is the result of our long experience in carbon frames..
Our unique manufacturing techniques eliminate the imperfections on the inner of the carbon tubes, ensuring a smooth surface free from defects. The result is an optimized rigidity-weight ratio and an increased fatigue resistance.
Carbon Dropout
Evolution of the SSD system where the aluminium dropout is replaced by another one made of carbon to achieve a higher rigidity and lighter weight.
Evolution of the ODB system to increase the rigidity and to improve the performance of the steering thanks to the tapered head tube 1 1/8-1.5.
Frames featuring Twin-Sys technology may equip either mechanical or electronic groupsets. Changing from one system to another is quick and easy
Technology developed to provide higher torsion resistance on 29 wheels through a 148mm hub, which optimises spokes angle within wheels. Hence, we achieve to shorten the length of the chain stay without modifying the Q-Factor, which provides greater sturdiness, rigidity and precision of both chain and seat stays.
Direct Fit
Direct Fit frames feature a post-mount standard fitting for the rear disc brake caliper. The rigidity of the assembly is improved compared to the traditional IS standard caliper mounting systems and brake efficiency is optimized.
Press Fit
The length and diameter of the bottom bracket have been increased to improve the lateral stiffness of the frame and enhance the power transmission to the crank set. The cups are lighter and mounted directly on the BB shell, which greatly reduces the overall weight.
The brake hydraulic house is routed inside the seat stay for an improved protection and to achieve a neat and clean good looking frame.
The Internal Cable Routing allows us to save weight and to protect the wires from the external environmental aggressions.
Evolution of the ICR system that integrates the cables into the chain stay.

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