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seat post I mean.
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spec for the 86 Tour de l'Avenir says "Zadelpen Selle Royal 26.6" so perhaps they reamed it out?
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In case this is of use ,1986 Gazelle brochure indicates 531 Trophy frames as having 26.6 seat-tube.
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just to say that reading the 1986 Gazelle brochure (many thanks) the Trophy frames are indicated as having 26.6 seat-tubes.
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We've had a rennkompressor on shop floor duty for 9 months. The original tube and schraeder/presta adaptor lasted for about 6 or 7. That's a VERY long time when you factor in 3 or 4 customers using them every hour, and most of the time thoroughly abusing it and using it incorrectly.
The seal on the presta adaptor is adjustable and replacable. The beauty of that unit is that it is infinitely fixable with minimal effort. If the presta seal failed on our pump, it was normally resolved by disassembling it and re-adjusting the fit of the metal outer casing, or simply chucking in a new rubber seal which cost all of 3 pence.
We only had to swap out the end after some retard tore off the entire hose/nozzle and stood on it.
bought a rennkompressor in 1992, this came with a substantial push-pull Presta brass head. Apart from occasionally replacing the rubber seal in this and once replacing the rubber washer in the main barrel it worked faultlessly --- until six months ago when a heavy flying object gave the barrel a severe dent. So took out a mortgage to buy a new one.(best deal - BikeBitsuk , he's old school - drives to Belgium and gets the stuff himself). Maybe I'm a fool but good design should be foolproof and that Presta/Shraeder head was awkward from the start and then became troublesome. Solution -- replace with with original 1992 head which has a larger rubber seal and also inserts over the valve to a much greater depth.
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don't get the SKS Rennkompressor with the Shraeder end and Presta adaptor. Mine ceased to be air-tight after a month. better would be the model referred to as having the "Classic" head. is capable of over 200psi.
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if you google "15% tire drop" you will find an interesting techy article on optimising your tyre pressure for your weight in order to achieve this magic percentage deflection .
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Hi, did the 41t chainring go ?
Looking for a TA 373 (120mm) bottom bracket axle or b/b complete. 68mm shell.