I have a cheap racing bike that I want to use as a second bike when I switch to a medium-sized racing bike. I live in the mountains of Alabama with a lot of climbs. I had to accelerate. I have Shimano Tourey bike brakes and gears. This gear product fits well when shifting. I've never done this, that's why I'm YouTube. It was straight. The old transmission was 7 speed 11-28. New gear 14-34. The high gear from the old one is faster, but that's enough for me. It's all about the climbing gear. I tested it right on my 15% grade road. The low gear works fantastic for a 7 speed on an easy gear with a big ring. Exactly what you need! Works as advertised.
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