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Top tube length bollox

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haro boy:
I'm an. Old school rider and trying to get my head around new bikes being judged on their top tube length.
Surely a bikes geometry is basically down to wheelbase, head angle and bottom bracket position? The top tube length is according to the seat post tube position , which is then governed by its angle, so how can the length of the top tube have anything to do with how a bike feels?

ED209:
rear triangle is smaller
top tube is longer
wheelbase is about the same

simples

dan-dare:

--- Quote from: haro boy on September 19, 2012, 09:31 PM ---I'm an. Old school rider and trying to get my head around new bikes being judged on their top tube length.
Surely a bikes geometry is basically down to wheelbase, head angle and bottom bracket position? The top tube length is according to the seat post tube position , which is then governed by its angle, so how can the length of the top tube have anything to do with how a bike feels?

--- End quote ---

Good point, well put..... :daumenhoch: :daumenhoch: :daumenhoch:

not johndub71:
Would explain the long manuals these young uns do. This witchcraft no braked hang 5s get me.

Jon The Bassist:

--- Quote from: haro boy on September 19, 2012, 09:31 PM ---I'm an. Old school rider and trying to get my head around new bikes being judged on their top tube length.
Surely a bikes geometry is basically down to wheelbase, head angle and bottom bracket position? The top tube length is according to the seat post tube position , which is then governed by its angle, so how can the length of the top tube have anything to do with how a bike feels?

--- End quote ---

It makes quite a lot of difference to how a bike feels if you're constantly smacking your knees on the bars or stem if it's too short  :)
I honestly think that we were let down in the 80s having to ride bikes that didn't fit.

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