Sprockets for trail

[Nicpapas]

Hello guys and have fun with your bikes!! I'm New at forum and i don't know if i write on the right topic if no let me know..
I have a 300 rr racing 20' and i want your suggestions about the sprockets.I have now 13 -48 but it's a little long for trail.

[00tundra]

I like 13- 51 myself.

[mtdirtbag]

A lot of it depends on elevation and terrain that you ride in and your ability, that makes it hard to give you specifics. I'm in NW Montana riding elevation ranges from 2800 ft to 8000 and I run stock gearing on my 2014 300. I have been riding for 50+ yrs, I now struggle in the more extreme terrain but I'm now starting my 8th decade. I've never been a fan of low gearing and have tried to adapt to the gearing the bike has, when I was riding Yamaha YZ250 2Ts I ran one tooth higher on the rear sprocket as they were basically a MX machine.

[JoeMaico]

I run a 13/51 as well on my 16 300 RE. I have had that ratio since day 1. Seems to be the best for the Colorado Mountains. If I were to change in the future, I would probably go up one in the rear to a 52. Not many opportunities for going WFO around here, but a lot of slow speed rock gardens. I am not plated though. If I was plated, I would want to run 13/48 so I would not over-rev when riding asphalt.

joe

[wwguy]

Just FYI: It's helpful to be specific about model years when asking and answering questions about RR/Xtrainer gearing. (Both share the same gearbox for their respective model years.) Using 13/51 on a 2016 will yield different results than the same sprocket on a 2020 bike.

2015-2017 models were built with 28/70 primary drive gear ratio and delivered with 13/51 sprockets.
2018-2019 were built with 27/72 primary drive and delivered with 13/48 sprockets.
2020-2022 are built with 27/72 primary drive and delivered with 14/49 sprockets.

See the specific model year owner's manuals for gearing details.

The Gearing Commander website is a great tool to compare the effects of various gearing combinations on RPM vs. groundspeed etc. If the factory configurations aren't already available for your bike on the website you can add them using the info in your owner's manual.