MTBc Posted December 13, 2012 Share I have a silverback vida 5 frame (2012), and am looking for a new seatpost, but not 100% sure of the diameter. I've been to the silverback site, and don't see the spec there - http://www.silverbacklab.com/2011_website_SILVERBACK/vida5.htm 30.9? Here's the a pic of my frame: https://www.bikehub.co.za/index.php?app=core&module=attach§ion=attach&attach_rel_module=hubmarket&attach_id=154879 Don't have the bike with me at the moment, so can't physically measure it. looking for a 400mm post for it (if anyone has one lying around, pm please ) Link to comment Share on other sites More sharing options...
Cippo Posted December 13, 2012 Share Vernier caliper. Is your old seatpost not marked at the bottom? Link to comment Share on other sites More sharing options...
HairyLegs Posted December 13, 2012 Share D=C/π Where D = diameter, C = circumference, π = pi (3.14159) Link to comment Share on other sites More sharing options...
RodTi Posted December 13, 2012 Share Or try and figure out what the clamp size is of the front der... [Aahhh - don't have the bike with you? Phone your a dealer?] Link to comment Share on other sites More sharing options...
droo Posted December 13, 2012 Share If it's not marked an you don't have a vernier, try mailing the supplier. Link to comment Share on other sites More sharing options...
Cav' Posted December 13, 2012 Share Vernier Link to comment Share on other sites More sharing options...
MTBc Posted December 14, 2012 Share thanks, its 31.6 Link to comment Share on other sites More sharing options...
RodTi Posted December 14, 2012 Share thanks, its 31.6 Cool! What did you end up doing? Link to comment Share on other sites More sharing options...
MTBc Posted December 14, 2012 Share Cool! What did you end up doing? i was kinda hoping no-one would ask that. ended up having the spec's printed on the post as MCipollini suggested. I had just never raised it above the max height mark before its a 31.6 x 400mm, but still a bit short, I need about 20mm extra on it, but worried about damage of raising it above the max mark. Probably need to upgrade the frame, its a silverback medium, which equates to 16.5", so probably need a large... I've read that if you are going higher than 400mm, it could cause frame damage due to the amount of leverage, though if I could get hold of a 420mm, that might just be enough. Link to comment Share on other sites More sharing options...
RodTi Posted December 14, 2012 Share i was kinda hoping no-one would ask that. ended up having the spec's printed on the post as MCipollini suggested. I had just never raised it above the max height mark before its a 31.6 x 400mm, but still a bit short, I need about 20mm extra on it, but worried about damage of raising it above the max mark. Probably need to upgrade the frame, its a silverback medium, which equates to 16.5", so probably need a large... I've read that if you are going higher than 400mm, it could cause frame damage due to the amount of leverage, though if I could get hold of a 420mm, that might just be enough. Ha - all been there, at some point. Yip - be velly velly careful with the seatpost, especially if (like me) you are big-boned! We naturally produce so much power that failure of the ugly kind becomes a real possibility if the seatpost doesn't have enough in the tube... Get the bike down to your lbs - they'll very quickly be able to tell you if you're running one too small... Good luck! Link to comment Share on other sites More sharing options...
MTBc Posted December 14, 2012 Share Yip - be velly velly careful with the seatpost, especially if (like me) you are big-boned! We naturally produce so much power that failure of the ugly kind becomes a real possibility if the seatpost doesn't have enough in the tube...Get the bike down to your lbs - they'll very quickly be able to tell you if you're running one too small... thanks for the headsup Found a calculator. http://www.ebicycles...r/mountain-bike and 1 or 2 others too.. definitely seems like I should be on a 19" or so, and the link above also suggests a 180mm crank (current is 175mm).Christmas shopping time for myself Edited December 14, 2012 by BrettMTB Link to comment Share on other sites More sharing options...
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