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Mid School BMX (>87) 1989 to 2003 (<05) => Mid School ( Keep the faith ) => Topic started by: ~nomad~ on October 24, 2014, 12:31 PM
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Hi guys, just trying to put my GT Proseries back together, and I am a bit stuck with the headset. The 1inch threaded type I have ordered is too small, and a 1 1/8 seems too big.
I am also short a seatpost, does anyone know what size is used?
Any ideas? :)
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What year is it?
Investing in a set of verniers will sort these problems out, they're cheap from good tool shops or even bad tool shops :LolLolLolLol:
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Its a 92.
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If it's threaded it should be either 1" or 1 1/8" there wasn't any other. Have you tried the bigger one?
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yeah the bigger one is miles out. Verniers say 1 1/4? The seattube is 22.1mm inside measurement. Would that make sense?
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ok, research tells me 1 1/4 threaded headset and 22.2mm seatpost!
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22.2 is normal not heard of 1 1/4"? Curious
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I think you need 32.5mm diameter headset cups - there are a lot of 1" headsets out there for narrower road bike & mini head tubes that are sold as '1" old school bmx' - but in fact they need shims to fit.
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Ok, seat post first, a 1992 gt will take 22.2mm post. That is often referred to as a 1" post as the seat tube is 1" outside diameter.
If it has that sized seat tube/seat post, then it will need a 1" threaded headset. 1 and 1/4" is not used for bmx so either the headset you got is " not what it says on the tin " or you've not used enough force to tw4t the cups in!!