Originally Posted by
maltess
I donīt have a computer in the bike, that can be a good improvement. I meant I use the 38 in the smallest and the second smallest position in the cassete and the same with the 48, then I fell I would like to have something a little faster
Speed is determined by gear inches and cadence. To go faster, increase your cadence, unless you are already have a high cadence, then a bigger chain wheel is needed. Unless your cadence is higher than 100, you don't need to change your gear inches.