exceeding recommended rim width
exceeding recommended rim width
(OP)
205-70-15 radial snow tires
Firestone's chart list rim width as 5 to 7 inch.
I got a good deal on alloy wheels, but they are 8 inch wide.
I'm going to use them anyhow.
Does anyone see Any problems aside from more difficult bead seating?
thanks
Dan T
Firestone's chart list rim width as 5 to 7 inch.
I got a good deal on alloy wheels, but they are 8 inch wide.
I'm going to use them anyhow.
Does anyone see Any problems aside from more difficult bead seating?
thanks
Dan T





RE: exceeding recommended rim width
Less protection for the wheels against "curb rash" and pothole impacts?
Stiffer ride?
FWIW, I once ran a set of 185/70-13 tires on 7" wide wheels, which is also a combination that's 1" above the currently specified rim width range. Year round, with no unpleasant occurrences.
Norm
RE: exceeding recommended rim width
Also we use 185-60-13 Hoosier radials (recommended 5 to 6 inch) on 7" alloy rims on the Lotus Cortina race car inflated at 30psi cold. No wear problems. 165-70-10 Yokohama AO32R's (recommended 4 to 5 inch) on 6" on the Mini, also at 30psi cold.
As indicated above, tires mounted on the wider rims than recommended still maintain proper wear/grip characteristics and pressure as would be expected from the narrower wheel. I attribute this, at least partly, to the VERY stiff tread belt.
Tire mfgr standards for wheel widths often/usually do not take into account what CAN be safely used but instead what is NORMALLY used.
Rod
RE: exceeding recommended rim width
Cheers
Greg Locock
I rarely exceed 1.79 x 10^12 furlongs per fortnight
RE: exceeding recommended rim width
RE: exceeding recommended rim width
Bead unseating is easier if you exceed the allowable rim width range. This means that impacting a curb at an oblique angle carries a greater risk of the tire suddenly deflating.
RE: exceeding recommended rim width
One inch over std is just not a great risk for such a happening...low pressure and 2 or 3 inches, as in dune buggy use, maybe.
Also some of the rather stupid tire mountings I see occasionally on the local rice burner "stink bugs"...But that's another problem altogether.
Rod