Wife has a Marin Sausalito E1 , 44T chainring, 11-51T cassette. Problem we are having is I like to ride fast (Fuji Absolute, 8 speed, old bike) and she has problem keeping up with me, on level surface she has to be in the smallest cassette sprocket, the bike uses Shimano Steps and is limited to 20mph but I'm not riding that fast . I contacted Marin and received this response :The short answer to your question is ‘yes’, you can change the gearing by swapping out the cassette or putting a new chainring on. For this task, I highly recommend going to your favorite bike shop to discuss what you want to do, what issues you currently have with the gears, etc. If you change one part, you might need to change another part to make it all work together. The shop, with your bike in front of them can discuss the options with you.

Good luck!

I've been riding for 55 yrs and have always self maintained my bikes so looking for advice should I try a cheap solution like a cassette with a 10 tooth sprocket or go to a chain ring with more teeth ?

thanks