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Discussion Starter · #1 · (Edited)
I bought a 2016 Grom with only 278km on the odometer (real)
I bought a pair of IRC tyres to help climbing the hilly rocky dirt roads of my environment that can also be very muddy during the rainy season.

Lots of beautiful clean mountain roads to around here but the stock 15T front 34T rear sprockets do not climb too well.

Would appreciate advices on what would work best for my specific need:
14T front and 31T, 34T, 36T or 37T rear?

What would be the pros and cons of the choice you would recommend?
I'm not a fan of super speed nor high Rev, just need a pair of sprocket that could help me move up the hills without damaging the bike.

Thanks
 

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I bought a 2016 Grom with only 278km on the odometer (real)
I bought a pair of IRC tyres to help climbing the hilly rocky dirt roads of my environment that can also be very muddy during the rainy season.

Lots of beautiful clean mountain roads to around here but the stock 15T front 34T rear sprockets do not climb too well.

Would appreciate advices on what would work best for my specific need:
14T front and 31T, 34T, 36T or 37T rear?

What would be the pros and cons of the choice you would recommend?
I'm not a fan of super speed nor high Rev, just need a pair of sprocket that could help me move up the hills without damaging the bike.

Thanks
I would recommend you start slow, and just change the front sprocket to a 14 tooth. No need to change the chain and it is a quick, cheap and easy project. Downside is lower overall top speed and speedometer is no longer correct (but you can get an electronic corrector for less than $100).
 

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Discussion Starter · #3 ·
I would recommend you start slow, and just change the front sprocket to a 14 tooth. No need to change the chain and it is a quick, cheap and easy project. Downside is lower overall top speed and speedometer is no longer correct (but you can get an electronic corrector for less than $100).
Kind of you to answer that post.
As I'm impatient, I already bought a set 14T, 36T rear along with a new chain Jomthai MAX428H.
Not sure that mean anything to you in the US though.
Anyway, you made me think twice before installing the set. I may follow your advice to start with just the front 14T without changing the stock chain that has only 1000 km from new.
Messing up with the speedometer is no big deal to me. No much use of it and GPS tells me at time I'm 7 km/h up reading from the stock Grom speedo compared with the GPS. I will never know the exact speed of this bike but that's ok with me.
Thanks for your input. Good to have one.
Best 🙏
 
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