I'm 5 7' and have to lean slightly forward to reach the bars. It's never put an ache in my back but after seeing everyone compliment the comfort after installing risers I decided to try a pair. At around 30 bucks I didn't have much to lose. The risers I purchased are 30mm up/20mm back. I'm extremely impressed. I no longer have to cant forward. I didn't think it'd make a huge difference but it really does. The clutch side control wires were extremely tight so I did have to reroute them behind (instead of in front) of the fork. And the front brake line was also tight. There's a bracket in between the forks that holds the brake line. I slide about 1/2 inch of slack to the top and all is good.