I have Sirrus X 4.0 for my daily commuter. On two spots of my ride home, I have a bit of a problem. Even while in the smallest gear on the cassette, I can't get enough speed to keep my lane safely. Meaning that I have more fuel in the tank, even with great cadence, I bottom out on the gear ratio. Basically I'm looking the fool for pedaling like a manic, and can't get any faster, as the gearing ratio will not allow.
I need a bigger chain ring, so I can go faster in traffic. ( This is not commentary on my fitness, just that the gearing does not allow more options )
I think I should be able to upgrade to a 42 or 44 ( perhaps more ) tooth front chain ring. This will behave more like a standard road bike, where I would be able to get more speed.
https://www.specialized.com/us/en/sirrus-x-40/p/200213?color=322032-200213
My questions is if this could be possible, meaning would the frame allow a bigger chain ring? Do I need to replace both the bottom bracket & spindle, just to allow for a bigger chain ring option? Anybody have recommendations for the parts to solve my problem?
by flippinsweetdude
1 Comment
The max chainring question is best answered by Specialized Ride Support. You can chat with them via the website. Once they give you that answer then I would drop this question on the r/bikewrench sub.