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I have recently been given an old MBK road bike which I intend to use a a run about. The seat post/saddle is knackered and needs replacing, I tried a spare 27.2 seatpost which will not fit. Does anyone know of a seatpost "standard" smaller than that and where to get hold of one?
Secondly the gearing is too high for my intended use, the front is 54/42 and smallest sproket on rear is 24 tooth, any suggestions on the cheapest way of lowering the range a bit. Could I put a 38 on the front, or a 26 tooth casset on the rear?
Thanks
No standard for seatpost size really, old one should have size written on it?
Gears...38 or 39 may fit, if you change the cassette tho you may need a new chain.
For the seatpost, you need to measure it, this goes for any bike seatpost, get yourself to a LBS or buy some vernier calipers for this.
Does the current one not have the measurements printed on it?
For the crank, you need to know the BCD, this will determine what alternate chainrings you can put on it, for the sprockets, how many speed / freewheel or cassette will determine what can be done.
If you need to replace the gears, would look at the cost of a complete bike as it will probably be cheaper to just buy a complete 2nd hand one / basic new from Halfords / Decatholon than fix an old one.
Thanks for the feed back, there is no size printed on the seat tube, I think it may have been on the chrome somewhere but has since been worn away. Thanks for the tip Re. calipers, will see what I can sort out.
Its a shame its geared fairly high because there is little wear to the chainrings and the shifters while down tube are at least indexed and work well. Might be best to leave alone and struggle up the hills then.