[Ron1000]

I’ve recently done the 15/42 mod. Absolutely brilliant I’d say…maybe a little bit buzzy for some and puts a dent in your fuel economy. But for me and my riding I love it.

Also as an aside, I recently changed the track bike R6 15t sprocket to a 16t that was easy to swap out with no mods to the chain or cutting or such like.

Another aside if you buy a chain tool buy the pbr one with quadstake anvil. Tremendous bit of kit. If you need the exact part no let me know I’ll dig it out.