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Technical & Reference Section => Tech and Restoration => Topic started by: 20to26 on July 17, 2009, 02:09 PM
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I've noticed on some of my GT frames that some headset cups fit very loosely (like they're 1.1/8"...) and I need reducers to fit a 1" headset. Strangely I just removed a Hatta MX-II from one to fit an Epoch headset and I need reducers... :-\
anybody know what gives? Are there 1" headsets with different cup size diameters on the OS bikes?
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it may be (and dont quote me on this) a road 1" headset - BMX headsets have a different size to road even though both are 1"
Chris King do an explanation that ill try and dig out in a mo....
here: http://www.aspirevelotech.com/Reference/CupSkirt.htm (http://www.aspirevelotech.com/Reference/CupSkirt.htm)
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thanks for that Si, it seems odd that in this particular case I'm fitting a GT Epoch style headset into a GT BMX frame and it's not a snug fit. About 1mm out each side as the chart in the link shows. So perhaps GT made some narrower cup diameter headsets too for some reason.
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Shim it with a coke can - always works!
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had same problem dans comp do a shim 7 dollars and about 40 dollars postage :daumenhoch:
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brass sheet to make a shim,from hardware shop , comes in different guages so you can get it a snug fit, couple o quid at the most for the amount you need, failing that
Shim it with a coke can - always works!
+1 on that :daumenhoch:
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I have a odyssey pro headset, and it needs a shim for BMX. Only ended up using the locking nut as that fits the threaded part fine. I think Crooch dug out the chris king thing when I asked this question.
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http://www.radbmx.co.uk/forum/index.php'topic=62798.0