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Not that they've turned up yet, nor that I have a bike to put them on, but I'm running SC Reserve so have the lifetime warranty, what attracted me to the inserts is the ability to run low pressure without the tyre folding over under side loading, and the promise of killing some chatter - which really killed my wrists on the Megatower last year.
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Yeah I'm also running Reserve rims. The warranty almost makes me hope I crack a rim to get my monies worth... of course thats silly but it definitely gives some peace of mind experimenting with the pressures. The side load support of the insert is what I'm after.
I'm lucky enough to have a few short 2 minute steep enduro type runs 10 minutes from home in the car. Lower than 25psi and it gets squirmy and dings to the rim can be felt. From what @pit has said cushcore should give me what I want.
Oh wow, those are crazy low numbers. What size tyres are running 14/17psi?? And er... if you dont mind me asking, what do you weigh?
I'm relatively late to the tubeless party having only converted last summer. I'm still experimenting with just how low I can go. Of course rider weight plays a part in the lowest pressures you can get away with, I've put on a bit of furlough weight and sit around 95kg kitted up.
25psi feels like as low as I dare go in the rear right now. Don't have any inserts yet but wondering if cushcore etc really would allow me to run much lower. My rims also have a lifetime crash replacement policy so I'd like to see if I could get away with much lower than 25psi and relish in the extra grip?
Anyone at or around my weight running super low pressures in 27.5 wheels?
Edit - should have said I'm running a set of 2.35" tires on one bike and 2.5" on another