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Look the part on race day with a Concentric Cycling Race Number Holder.
Our dedicated race number holders are perfectly dimensioned for your seat post, lightweight (~20 grams) and won't move around like rubber bands or zip ties will.
Manufactured in Australia from Carbon Nylon for strength, durability and heat/UV resistance. Supplied with
4.9
16 ratings
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Clean. Functional. Classy.
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Ryan · June 1, 2026
2-bolt fitting makes for secure mounting of race plate
As the title indicates, the 2-bolt fitment makes for a very secure fit. No longer need to add grip paste in between the bolt and the race plate.
I did have to punch extra, larger-diameter mounting holes as my existing race plates were positioned for single-bolt fixing, and none of the existing mounting holes fit the 2-bolt 'retaining pins' anyway.
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Reuben · January 8, 2026
Fits neatly around the seat post.
The number holder clamp fits neatly around the very unique profile of my Bisnchi seat post.