Trek Speed Concept triathlon handlebar extension spacer
6 sizes - compatible with Speed Concept handlebars only
€32.50
(1 review)
Set of 4 FastTT M6 CSK countersunk head bolts for extensions
(1 review)
Screw heads for adjusting your aerobars – 12 different lengths
Our opinion
These countersunk screws ensure reliable tightening of FastTT extenders. Made of stainless steel, they offer durability, strength and a flush finish for optimal installation.
Nicolas D.
Technical expert
The FastTT M6 CSK countersunk screw is specially designed for securing triathlon and time trial aerobars. Its flat head allows for flush mounting to avoid any aerodynamic drag or discomfort. Made from stainless steel, it guarantees excellent corrosion resistance and optimal durability. This screw provides a reliable and secure fastening, essential for keeping the aerobars in place even under heavy stress. Compatible with most FastTT aerobars, it is an essential component for a professional and stable installation.
Technical specifications
- Available lengths: 40mm / 50mm / 60mm / 70mm / 80mm / 90mm / 100mm / 110mm / 120mm / 130mm / 140mm / 150mm
- Type: Countersunk screw
- Size: M6
- Material: High-strength stainless steel
- Head: Countersunk, flush
- Use: Mounting triathlon / time trial extensions
- Durability: Corrosion-resistant and robust
- Tightening: Reliable and secure
- Compatibility: FastTT aerobars and M6-compatible models
- Finish: Polished stainless steel
- Brand: Fast TT
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Philippe V. 
Published May 09, 2026 at 06:24 pm (Order date: Feb 22, 2026)Same, 2 months to get the part (Translated review)
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