Math Problem?

Bill G

Member
Region
USA
Am I getting full range on my Enviolo 380?

My Enviolo hub was making a noise. My LBS got rid of the noise, but I’m not sure I’m getting the full range on the hub. My highest (hardest) gear might be a little low. Does it make sense that given that I have 27.5 inch tires, a hub with a 0.5-1.9 ratio range, I should be able to put my bike into the highest and lowest gears, pedal at a fixed rpm (say 75), and by the speed achieved, know that I am getting the full range on my hub?

Do any of you know how to calculate what speed I should achieve at 75 rpm at the 0.5 and 1.9 ratio given a 27.5 wheel diameter? Thanks.
 

Roamers

Active Member
Region
USA
There are many gear/speed calculators online. Not endorsing this one as accurate, but an example. Keep in mind these will be "close" because your tire circumference varies based on tire pressure.

 

Bill G

Member
Region
USA
Many thanks. They even listed the Enviolo Trecking hub. Now I'll have to road test it.