Renthal are without a doubt one of the best you can use.
Have a set on the SP1 and wouldn't change them back to original grips
The Renthals are made up of thinner more grippy rubber so they feel smaller to the hand when riding, and give better feed back than stock grips
If you are slapping them onto an RC51 (SP1) then you will feel more vibration, but not enough to complain about
Buy a set you won't regret it

( not working on commission honestly

)
Oh yes, forgot to say, medium compound felt better to me but you have a choice of three
H T H good luck
