Thomson Oversize Rail Clamp are for saddles with carbon rails, these tend to be oval and larger, 7 x 9 mm and 7 x 10 mm being the common over-sized rail dimension.
So, if you have rails larger than 7 mm do you need this new clampset? Maybe, maybe not. Thomsons standard rail clamps can accommodate rails up to 7 x 10mm, but riders using their setback post with over-sized rails may have issues getting the saddle nose down. If this is you, the over-sized rail clampset will give you about 5 to 8 more degrees of nose down adjustment. The over-sized rail clampset is also more cosmetically appealing than the standard clamps on over-sized rails.
The over-sized rail clampset is compatible with any vintage Elite or Masterpiece seatpost.
Seat post clamps provide that neat finishing touch to your frame, they are often available in anodised colours to match the rest of your bike. We list a range of clamps with both quick release, for quick and simple saddle height adjustment as well as allen key versions.
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Executive Director: Stefan Barden.