Ok, I've got an old 80's roadie bike made by Toyo Tiyama (or something like that), and it rides ok, but the gearing is a little too low for me. I was wondering how can I gear this up a bit?
It has a triple on the front, 26-36-46, which does the job ok, but it uses 6 bolt chainrings, so I might end up having to replace the crankset once the chainrings go, as I've never seen anywhere that sells 6 bolt chainrings. Now I've seen some shimano tiagra hollowtech 2 4403 cranks for sale for around £35 which I reackon would do the job as they will give 30-42-52 chainrings. Would this work ok, or would I have to get a new mech and other bits?
Now, the rear wheel uses a 5 speed freewheel, which has a range of 14t-28t. Now, If I was to rebuild the wheel with a cassette hub, would I be able to use an 8 speed cassette with a range of 21t-11t? Would a cassette hub from a MTB work or do roadie bikes have different spacing? I ask this because I have a few spare 26" wheels which have perfectly good cassette hubs on which I could use.