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Posted by: ProEMTPFF
Anyone know the max size tire I can go on a stock Yamaha Rhino? I'm looking at 27" tall but unsure of the width I can use on the stock lift and rims?
Posted by: DesertViper
I ran 27s on my old Rhino and nothing rubbed at all. I had 27x9 in front, and 27x12 in the back. The full width front tires will increase steering effort significantly, and increase stress on tie rod ends, the steering rack, and your thumbs when you hit that stump.
You might squeek by with 28s. But will the Rhino turn them? The Rhino is geared tall, and struggles to get big tires moving from a dead stop. Once you're moving you're fine, but getting moving from a dead stop sometimes doesn't happen at all with 27s, even in low range (dependent on the severity of the trail obstacle you are trying to conquer). Using the speed is my friend approach helps.
You may be able to improve low end take off with clutch mods though. There are several different sheaves available for the Rhino. KMS makes one that increases top speed, but actually hurts low end performance. Hunterworks makes one that improves low end gearing slightly, and also increases top end, but not as much as the KMS sheave. I have a Trinity sheave, which is best for motocross because it is tuned for maximum acceleration. Rhinocrap also has a sheave that they sell. Changing to lighter roller weights in the clutch helps build RPM quicker, and changing the secondary spring helps both low end response, and backshifting, depending on whether you go with a softer or stiffer spring. Changing the wet clutch springs helps build RPM quicker before engagement.
I would say to drive a big tired Rhino before going too big. I stayed with 25" tires with my current Rhino.
DV
