jcb

I got some 19.5 tires and my truck has 3.55 gears with a 5 speed are the tires going to make my gears too tall to haul with? I need to buy the gear to correct the speedo.

JohnX

Thats roughly a 32 inch tall tire (factory was probably about a 29?), probably okay on the ratio....but it all depends on what you mean by "haul"?

Are we talking 10k trailer or 30k fifth wheel? I wouldn't even worry about anything under 10, once you get beyond that you may find you have to ride the clutch a little to get moving.

As for the speedo, you'll probably read about 10 % slower than what you're actually doing...Mine is off that amount, but it is so easy to calculate I haven't bothered changing the plastic gear.

WhiteSport600

I've got 19.5's on mine with 3.73 rear gear, and I sometimes wish I had 3.55's. You'll be fine with them. Your speedo will only be off about 5mph @ 70mph.

GPSflyer

Ive got 8r19.5"s on mine with 3.55 gears, I love it. The truck doesn't seem to be winding out so high on the freeway now, the 8r19.5"s are about 33.5" tall.