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[Closed] How does fork length alter geometry? And bb height?

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[#2095500]

Im currently looking at getting a new hardtail 29er frame, the geometry given on the website, is for when the bike is set up with 80mm forks.

I want to run it with 100mm forks but i dont no how much this changes things.

The headtube angle is 72d
The seatube angle is 73d
with a bb height of 11.8"

How much will 20mm effect the bikes and its ride?

Also on a completely different note, as the yeti bigtop comes with iscg 05 mounts,rear wheel option for 12mm,and a 1.5" headtube. that you might get away with a bigger fork?

Thanks
MB


 
Posted : 17/10/2010 1:42 pm
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half a degree slacker, 10 mm higher bb approx

20 mm longer fork = 15 mm higher ride height after sag. 25 mm higher ride height = 1 degreee IIRC

Marginal difference


 
Posted : 17/10/2010 1:48 pm
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1 degree = 17mm fork length = additional length of your fork sagged (a-c being equal)

bb height would change 1/4"

Unlikely to make a huge difference. No idea re your last q.


 
Posted : 17/10/2010 1:48 pm
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Thanks gents.


 
Posted : 17/10/2010 1:56 pm
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I've done the maths so am confident my figures are "da bomb"


 
Posted : 17/10/2010 2:05 pm
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[url= http://bikegeo.muha.cc/ ]Geometry calculator here[/url]


 
Posted : 17/10/2010 2:47 pm