375/20R21
- Thread starter anton28
- Start date
AbsolutHank
Enthusiast
It will look awesome buddy. My next Viper won't be supercharged and that's the combo I'll run
bmw2nv2000
Enthusiast
I too think the 20/21 combo is a good look, seen a couple of widebody C6 vettes with that combo and its very 
for street. I may go that route with my current coupe
for street. I may go that route with my current coupe
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bmw2nv2000
Enthusiast
Here is a 20/21 combo with 375 tires on back on a SS widebody vette. Of course the viper would just have a 4" rear lip and not the 8" lip this vette has.
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AbsolutHank
Enthusiast
Check out the COR Forged site. They had a light blue Z06 with gray "Trident" wheels in that size.
Already done it... sold three sets. They look incredible.
Sorry though, no decent pictures of them yet, they are all either not installed or installed on immovable cars!
This is a set of Imola's, Anthracite centers, Carbon Lips, Orange Pinstripes on an Orange Gen-3/4. One other set is full chrome Classic-2's being installed Monday on a Red Gen-2, and the last set that is still in production is a set of Astras, Translucent Black Clear over Polished center, Carbon Lip, Red Pinstripe on a White Gen-3/4.
Sorry though, no decent pictures of them yet, they are all either not installed or installed on immovable cars!
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This is a set of Imola's, Anthracite centers, Carbon Lips, Orange Pinstripes on an Orange Gen-3/4. One other set is full chrome Classic-2's being installed Monday on a Red Gen-2, and the last set that is still in production is a set of Astras, Translucent Black Clear over Polished center, Carbon Lip, Red Pinstripe on a White Gen-3/4.
Please post pics ASAP
The Gen-2 chrome set I can get pictures of early next week. It will be a while for pictures of the other two.
And for anyone wondering, yes, the contact patch of these Pirelli's is a full 1.5" wider than the 335/345's!
bmw2nv2000
Enthusiast
Dan as soon as you get some shots of any viper on 20/21 combos you have to start a thread and then as you get pics of the gen3 cars you can update the thread. I will be the first member to subscribe to that thread
Will do. The cars are running a 375/20/21 rear, and a 295/25/20 front.
One of them will be running 305 or 315/25/20 however... its my car, so I will take the chance on clearance, but it should be fine.
One of them will be running 305 or 315/25/20 however... its my car, so I will take the chance on clearance, but it should be fine.
AbsolutHank
Enthusiast
I have the pic saved at home of the 345/20 Invo compared to the new 375/21 Pirelli...very big difference!
Chambers has 20/21's on his silver Underground car, and it looks great. I have multiple pictures of that car, but not mine to post. I am kicking around running them as well. It actually does look good, but iForged I believe is limited to a three inch lip with the 21. I am not sure if other brands are able to get a four inch lip or bigger. Definitely not a wheel for Chuck, but it is a good street car look, and should perform similarly to 20's. I don't think the overall width is really all that much different from a 345/25 Nitto or Pirelli. Wider, sure, but not all that much.
SkyBob
Enthusiast
Jance GTS
Enthusiast
Anyone doing this on a Gen 2? I'm ordering 20's all around next week...
aries
Enthusiast
Hard to tell from that pic but it looks like the tire is sticking out of the wheel well way too much. If so, I definatley don't like the look of that.
Dan what is the weight of the setup? Have you measured the width of the 375? What width wheel are you using?
dave6666
Enthusiast
The 20" iForged that you sold me for the rear of my GTS... running PS2s... I already have a slight rub with no lowering. How in the world are you getting a tire that's 1-1/2" wider in the back of a Gen 2? Will all that fit INSIDE the wheel well or is it going to extend out past the inside edge of the rolled under fender lip? Which is where mine rubs.
Thats strange. I had HRE545's and HRE547's on my GTS and it was SLAMMED with no rubbing issues. I was running 20's all the way around and PS2's. Maybe the I forged wheels have a bit bigger outer lip
dave6666
Enthusiast
Thats strange. I had HRE545's and HRE547's on my GTS and it was SLAMMED with no rubbing issues. I was running 20's all the way around and PS2's. Maybe the I forged wheels have a bit bigger outer lip
I do have a 4" lip on the rear but it's the tire that rubs not the wheel of course. The question still remains, where do you stuff an additional 1-1/2" of width?
aries
Enthusiast
Sorry but I think the rear end of this car looks like total crap with the wheels sticking out like some 82 Buick Reagle low rider.
Sorry but I think the rear end of this car looks like total crap with the wheels sticking out like some 82 Buick Reagle low rider.
I agree. Those aftermarket SSrear fenders are crap.
I believe the because of the biger Iforged Lip vs the HRE lip you have bigger out lip vs your inner lip and that is why your tire rubs. More rim on the outside then the inside.
To run those 375's on a gen two with I-forged wheels you would definitely need to roll the rear quaters, or trim them in our case since they are fiber glass. I do belive there is enough room on the inside of the car to fit the extra wight on the inside. You would really need to play with the offset to get it right.
Nope, its fine. The car has no engine or trans in it, so it is sitting REALLY high. It sticks out the same as the 20" iForged wheels with the 4 inch lips, or the HRE's for that matter.
I havent weighed it, but I think it may actually come in LIGHTER than a 335/30/20 setup, as it is actually 1/2" smaller overall. Its just a tad larger than the 345/25/20 lots of Gen-2 guys use.
The 21 is a 13.5" rim, and the tire itself has a 13.25" tread contact, and is over 14" wide at the bead. [335/30/20 and 34/25/20 are about 12" contact/13" at the bead]
The main rubbing issue on the 20" is the tire DIAMETER, not the width. These tires actually end up being shorter than yours, even though they are wider. The width has next to nothing to do with it in these cases. Most of the width is added onto the back of the wheel, not the front.
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Thats strange. I had HRE545's and HRE547's on my GTS and it was SLAMMED with no rubbing issues. I was running 20's all the way around and PS2's. Maybe the I forged wheels have a bit bigger outer lip
The difference is that you likely were running a different offset than Dave had to, because of his Big Brake kit. That is the problem that is often run into- there it not enough "curve" in the spokes to adequately tuck the wheels, and still clear the Calipers. They may have been able to change your offset to "tuck" your wheels more, or you were not running the same tires as Dave. If you had 335/30/20, then you must have had a lucky unaffected car. I suspect you were running a 325/25/20, which will NOT have any rubbing issues.
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The lip sizes are the same for many of the HRE/iForged sets. The offset can only be played with so much, depending on the caliper/rotor sizes. I do not anticipate a problem with the 21's on the Gen-2 however, as the wheel is tucked the same as a 4" lipped 20", but is actually smaller diameter overall. The width is not really a factor here.
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