Jonny69
Senior Retro Guru
I'm looking at my options to switch my Bob Jackson from SS/fixed to geared. It's not got any brazed-on bosses for shifters, instead a pretty little wedge for a band-on shifter to nestle against. Are there any band-on shifters that are indexed or are they all friction?
Next question that is related: Rear spacing is 125mm or thereabouts. I was going to go for a 5-speed screw-on block, which is most likely what the bike would have originally had. Are 6-speed blocks the same width or wider than a 5? Are the gears spaced the same i.e. if I were to use an indexed shifter would it shift both a 5 and a 6 or are the spaced differently?
I'll probably stick with 5 gears, mainly because I already have one in my box ready to use. I'm also not interested in spreading the rear stays or using more-modern cassette systems, simply because I've got my hubs and rims ready to build up - just looking into gear options.
Ta muchly folks!
Next question that is related: Rear spacing is 125mm or thereabouts. I was going to go for a 5-speed screw-on block, which is most likely what the bike would have originally had. Are 6-speed blocks the same width or wider than a 5? Are the gears spaced the same i.e. if I were to use an indexed shifter would it shift both a 5 and a 6 or are the spaced differently?
I'll probably stick with 5 gears, mainly because I already have one in my box ready to use. I'm also not interested in spreading the rear stays or using more-modern cassette systems, simply because I've got my hubs and rims ready to build up - just looking into gear options.
Ta muchly folks!