widening H3 Aluminium mags

[Sennin]

I'm thinking of widening the stock H3 mags toeleviate the floating when airing down the 35" tires.

Jay or Nay? what do you guys say?

 

[evldave]

We used to widen mags on muscle cars back in the day. If you go to a good place, there should be no issues.

Don't forget, a 35" tire on a wider rim will be different than 35" once you are finished - as it stretches width, it will likely change in diameter (slightly - it will vary based on how much you widen the wheel).

Also, make sure your tires are rated for the new width - the tire manufacturers generally have guidelines on their website. On road, the guidelines can probably be stretched (pun intended) but I would stick to them if you are going to be using the truck offroad - you'll risk popping a bead if the rims are too wide.

Also, make sure your backspacing is correct - if you widen from the center (both inside and outside the center of the wheel), then you are more likely to rub. If you widen outside the center of the wheel (the other lip moves away from the hub) then you should be ok.

Just curious, how much wider are you looking?

 

[rsc]

Are you thinking of stretching or cutting and welding? I would personally buy another set of wider rims for the cost involved.

 

[Sennin]

The recommended rim width for a 315/75R16 tire is bet ween 8.5" and 12 ". The stock rim is 7.5" so im thinking of having a band inserted to widen the rim by ~2" to make them 9.5" and then using a spacer to get the offset correct. The thing is I just love the look of the Hummer mag, I actually bought a second set to use on my trailer as well... thus having 3 spares thats interchangeable (HUmmer, Trailer, and roofrack)

 

[rsc]

I agree, GM did good with the stock wheel design. Not just in looks, but the lip is designed to hold the tire bead more securely than standard rims when aired down. I had seen a picture of the difference some years ago online. I think getting them widened would work, but look into the pros/cons of wheeling with wheel spacers.

 

[chaos254]

I think this a good idea. I was leary of running such a big tire on just a 7.5" rim. My mustang has 315/35/17 but on a 10.5" rim. The additional 2" width you plan on adding should definitely help with stability

Sent from my SCH-I545 using Tapatalk

 

[Sennin]

I think this a good idea. I was leary of running such a big tire on just a 7.5" rim. My mustang has 315/35/17 but on a 10.5" rim. The additional 2" width you plan on adding should definitely help with stability

Sent from my SCH-I545 using Tapatalk

Jip, I have had the 35" tires on the hummer now for 3 years, and airing down to 0.6bar when doing trails and yet to have a de-bead., although, you can hear slight rubbing in certain conditions due to the floating of the tire. in the following pic you can see the amount of float in a mild obstacle.