Replacement shifter to fit brake lever?
I'm looking to replace my gear shifter which is currently mounted on the brake lever. I'm currently using an old Altus A20 system, will I be able to find any shifters that fit my brake lever. The only brake/shifter combo's I can find are for V brakes and I use cantilever. Is there any other compatibility issues with gears shifter for example could I switch to grip shift without changing my dérailleur?
Since you live in the UK I'm not so sure.
In the US I'm pretty sure that replacement shift and brake levers are still available for 7-speed EZ fire and canty brakes. An LBS can get them.
In a pinch you can use the V-brake levers. They'll function fine but you'll have to squeeze the lever a little harder. Assuming you have normal hand strength it's not a big deal.