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 Post subject: 29er top tube length
PostPosted: Thu Jul 12, 2012 11:26 am 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4437
Location: Herts UK
a quick look at Specialized and Cannondale bikes seem to show that the top tube on same frame size bike (19 in or Large) is 20 mm longer on a 29er than on 26er.

How come?


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 Post subject:
PostPosted: Thu Jul 12, 2012 5:32 pm 
Gold Trader / MacRetro rider
Gold Trader / MacRetro rider

Joined: Sun Sep 04, 2011 11:33 am
Posts: 3098
Location: Riding my Woodsie.
Bent seat tube?


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 Post subject:
PostPosted: Thu Jul 12, 2012 6:20 pm 
retrobike rider
retrobike rider
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Joined: Tue Jan 29, 2008 11:04 pm
Posts: 1800
Location: A wretched hive of scum and villainy...
To keep the toe clearance the same?

622-559/2= roughly 32mm less toe clearance, unless you lengthen the TT to compensate.

I added 24mm to mine, the rest is taken up by the 8mm longer fork rake.
Just ran a shorter stem to get the reach back to normal:
Image

All the best,


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 Post subject:
PostPosted: Thu Jul 12, 2012 7:35 pm 
Old School Grand Master
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Joined: Mon Jun 14, 2010 9:06 pm
Posts: 4437
Location: Herts UK
yep - that'll be since the seat and head tube angles remain the same - kinda obvious but I've never had toe clearance on any bike.


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