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Large ones? Maybe.
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Marathon ++++++++++++++++++++'s.
You don't want to be changing it too often! -
Tyres are solid rubber, cut a length about 1" short of wrapping around the rim and put a metal corkscrew type insert into one end, then twist the other and wind it onto the 'screw'. Leaves a tight fitting band of rubber (I hope).
Been playing with a lathe today, I drew out the headtube and steerer I wanted when I was bored on Monday, got the headtube finished and steerer is half finished.
Couple of drawings:
First steerer won't have threaded portion, internal steerer diameter is that of a 1" steerer so I can use a star nut
28.60 Steerer portion with taper
Rotated in chuck ready for 30.015mm crown race fitting portion of steerer to be turned
Headtube for External Headset
Couldn't figure out why the surface finish was crap until my tool cracked and shattered on the finishing cut...
And finally a drawing for an internal headset headtube that uses BMX style bearings, I will not be producing the external taper just uniform with two steps at the bearing seats
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hp93
jdp
Harry_C
@Jonny69
What sort of tyres do these actually use?