There are calculators online - they are conservative.
Personally I'd get modern because more heat less space.
Thats some wise words... only prob is I have no idea where to find nice modern ones... all the ones I find online are "designer" which usually means gross chrome and big flat panels.
All the bog standard DIY shops sell 'em
@chrisbmx116 started
London Fixed Gear and Single-Speed is a community of fixed gear and single-speed cyclists.
There are calculators online - they are conservative.
Personally I'd get modern because more heat less space.