Any car tire gurus out there??

[CanuckHoss]

On my 57 trike I have 275 / 45 R 20 on a 10" wide rim

Circumference is 93.44 inches. about 12% over the stock 15 " rims.

I am going to get stock , new style factory rims, 17 " by 8" wide and want the same circumference so the RPM s are very very similar.

What is the widest tire I could run on the new rim??

Stock tire size on that 17 inch rim from factory is 235 / 60 R 17 but that is smaller in circumference by over 5 ".

[arizona outlaw]

try a 275/ 50 R17

[arizona outlaw]

try a 285/ 50 R17

or 255/60 R17
or 275/60 R17

[CanuckHoss]

try a 285/ 50 R17

or 255/60 R17
or 275/60 R17

275 50 r17 is 6 inches smaller...about 6% more rpm

285 50 r17 still 5% more rpm

255 60 r17 about 2.5% rpm

275 60 r17 is only 1% more rpm...I could live with that...

[Tx Outlaw]

Just make sure the wider tire doesn't rub the body. Not sure your clearance or off-set of the rim, but it could be a bad situation.....
I'm sure you have already thought of this tho.

[CanuckHoss]

Just make sure the wider tire doesn't rub the body. Not sure your clearance or off-set of the rim, but it could be a bad situation.....
I'm sure you have already thought of this tho.

Been told by more than one that those new style rims fit / can replace the older style rims...the offset is similar so no worry there.

Also the tire I am running now is on a 10" rim and is wide ass so going to 8" I should be OK..."should be"..never for sure till you try

Thanks

[CanuckHoss]

here is what the Factory says are the specs of the newer style rim.

"New Style 17" x 8" , 5 on 4.5" / 4.75" Dual Bolt Pattern,
4 3/4" Backspace +6mm Offset"

Can somebody point me to an actual rim to buy somewhere that has these specs??

or even the same specs in a 17 X 10 or 18 X 10??

I am not rim or tire expertised...just looking for help