RuanSteinberg Posted October 11, 2021 Share Good Day, I would like to find out something, I have a 2016 Giant Anthem X 29er Mountain bike, the Seatpost is 30.9mm but would like to know what clamp do I need to use for this bike, I was told 31.8mm but a lot of people online says 34.9mm. Any advise would be appreciated. Regards Ruan Link to comment Share on other sites More sharing options...
GHOST FACE Posted October 11, 2021 Share Anthem's take a straight 34mm double bolt seat clamp. Giant JHB should be able to help you. Link to comment Share on other sites More sharing options...
100Tours Posted October 11, 2021 Share edit - answered above Edited October 11, 2021 by 100Tours Link to comment Share on other sites More sharing options...
droo Posted October 12, 2021 Share Depends if it's carbon or alu. The carbon one takes the double bolt 34 as above, which you'll only get from Giant. The alu frame takes a standard 34.9. dasilvarsa 1 Link to comment Share on other sites More sharing options...
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