bballboy06

What will fit on a 74 convertible without rubbing?

will BFG Radials 255/60/15?

let me know your thoughts

dntoearthman

That's what I run

bballboy06

You run those on a 74?

No issues at all with them?

Did you have to change the plastic speedometer gear?

croaker

What type rims ?

Patro46

275-60-15's on the back and 255-60-15's on the front. No rubbage

vmsns007

I just bought a 74 vert. with rally wheels. Running BFG 235/60/15's all four corners

dntoearthman

On my 68 with 8'' rally's I don't have any problems my brother runs them on his 77 as well

kgb02c5

8" rallys, 225/70/15s all around...No problems on a 76

René K.

225/70 R15 all around is the standard size I use without any issues... 255/60 R15 were used as option on later models and might have interfearance issues on a 74.

69Vett

you can go up to 245/60/15 this will fit most C3 applications, without fitment issues front and rear,
sizes larger than this, many variables come into play. all this assumes original offset wheels.

augiedoggy

same here on my 74 but changing to 255/45/18 soon

keep in mind bigger tires can have a noticable sluggish effect on the gear ratios... These cars already suffer in this department and larger diameter tires make it worse.

When I increased the tire size in my jeep and truck it was quite a dramatic effect as far as power loss. going from 28.x sized tires to 35" for example required going from 3.38 to 4.56 gears in the rear end just to bring the final gear ratio back to stock and be able to use the overdrive and have the speedo work correctly with the stock gear..... on my jeep I had to switch to 4.56 gears to have the correct ratio with 32" tires and use 5th gear and original speedo gear.

just a couple inches diameter difference is like putting the next size numerical gears in the rear end. A lot of people dont understand this... Truck forum is full of kids with big wheels on thier trucks complaining they drive like dogs and cant get out of their own way.

GUSTO14

I also run the 255/60R15 all the way around on my '73. Minor rub on the drivers side, on the head of one of the carriage bolts that anchors the steering box to the frame. (It keeps the head of the bolt nice and shiny!)



255/60R15 was the optional size starting in 1978 and is the same diameter as the standard tire, 225/70R15.

Good luck... GUSTO

molsen

Been running 255/60r15 on my 69 for over 18 years, no rubbing what so ever. Have been running a/m ralley rims 15x8.