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Staggered Tire Sizes front/rear

36K views 127 replies 32 participants last post by  Dougie01  
#1 ·
One of the video reviews mentioned that the id.4 has wider tires on the rear (?). Does anyone know if that is just the FE, or FE & RWD Pro, or all id.4s? And are the wheels different, or just the rubber mounted on the wheels?

Sounds like it would make rotating tires impossible. Either dealers will be horrified at their inability to do rotations, or happy to sell replacement tires 30% sooner.
 
#2 ·
All the ID.4s have wider rears. FE & Gradient have 255/45R20 on rears and 235/50R20 on fronts. Pro & Pro-S have 255/50R19 on rears and 235/55R19 on fronts. The 20" wheels are 20Ă—8" in the front and 20x9" for the rear. The 19" wheels may be 19Ă—8" all around but are unconfirmed.
 
#19 ·
#3 ·
Related: I'm typically not a fan of larger rims. As an example we purposely turned down the optionally installed 19" on my wife's GLA and asked the dealer to rather install the standard 18". This afforded a taller tire profile sidewall and therefore a bit more comfort and pothole protection. It also provided our preferred silver vs. black rims, but that's another subject matter. ;)

I get tho' that in more moderate year 'round climes many like to "fill the wheel wells" with larger rims for improved aesthetics.

However I find the 20" rims on my FE to be sublime from both driveability and aesthetics viewpoints. And the hybrid silver-black "swoosh" pattern is appealing even to someone like me who doesn't appreciate all-black rims. Well done VW !!

Back on subject: RWD vehicle rear tires are more likely to wear out sooner then the fronts. But you can just replace those two rather than all four when the time comes so pretty much a moot issue wrt rotation. You can also rotate side-to-side on the same axle as long as the tires are not directional type.
 
#4 ·
It’s been talked about here pretty exhaustively. I suspect the surprise/concern comes from folks not familiar with RWD vehicles. Combination of a rear weight bias and RWD likely led to VW’s decision to put wider wheels/tires in the rear, as it helps both stability (makes ID.4 less likely to oversteer) and traction (straight line and turning). Indeed, makes rotating front to rear not possible, but you can still rotate side-to-side.
 
#5 ·
On Porsche the right rear wears out the fastest so if your concerned about maximizing tire wear you’d definitely want to rotate side to side mainly on the rear. Front tires will wear darn close to the same. In the end you’ll probably get 2/3k mikes more from the tires By swapping side to side. Is the lost time to make extra visits worth it? You’ll have to decide that
 
#7 ·
My old Mercedes had the same issue. Plus, the run flat high performance tires only lasted 8,000 miles in the rear. My service advisor said the right wheel wear had to do with how the car sent power to the wheels.

My RWD Tesla has fairly even wear between left and right.
 
#6 ·
VW has on all the 77 kwh versions the staggered wheel setup for their 19/20/21 inch's 235/255

for their 52kwh battery version they have also an 18 inch version [Falun], but no info about that, my expection is 235 all around, same for their 19 inch, its says 235 all around. 19 inch rim for this version is the same as that from the 77kwh version [Hamar], but the 52kwh versions is lacking power (204 -> 149 bhp).
 
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#10 ·
I am not sure for a compact spare, but I have a spare 18" wheel laying around that I will probably put a 235/60/18 on. That is a 29.1 diameter which is 0.1" larger diameter than the rears and -0.2" smaller than the fronts. Pretty much equal. I think as long as you find one that is between 29 and 29.3 in diameter you would be fine on both the front and back. A full sized spare is not compact, but on a trip it makes me feel better having one even though the odds of a flat are very low

here is a good conversion calculator: Tire Size Calculator
 
#21 ·
As PorscheTek stated, the rears are going to wear faster than the fronts, so while front to rear rotation would be nice, get used to replacing two tires at a time.

Regarding having a spare in the garage, I'm expecting the full sized ID.4 front wheel + tire will fit the rear in a pinch. That's my setup for my i3, which also has staggered tires and wheels. That car has a tire size that isn't always in stock, so it's good to have something to roll around on while waiting.
 
#27 ·
I am aware (and 255 on 8" rim is almost "stretching"). I actually prefer a wider tire on smaller rim and will bubble the tire and reduce chances of curb rashes as the tire will buldge over the rim.

I was just thinking if you change rear tires from 255 to 235, the rear tire will not extrude as much (but again, only approx 3/8" so only the most "obsessive" will even notice).
 
#28 ·
Anyone know if the AWD model will end up with same size tires on both front and back?
The website doesn't change the tire info if you select the AWD model, but then again, the website is pretty bad.

Wheels/Tires : 19-in x 8J aluminum-alloy wheels, 235/55 R19 105T XL (NAR) in front, 255/50 R19 107T XL (NAR) in rear
 
#29 ·
I've tried to figure this out. my guess is tires will be staggered. my rationale is this... the rear motor produces 200+ Hp while the front one should be slightly smaller in producing 100 or so Hp, hence total of 300+ Hp which I believe is the advertised total Hp. So based on that I'd say the tires will remain staggered. I suppose if they are the same size it wouldn't really hurt anything except you just need to be more diligent in rotating them to keep up with the health of those tires.
Now the best and most fitting scenario is they ended up with two of their 152 Hp motors for front and back and therefore putting in same size say 235 or 245 tires for front and back. that would make much more sense to me. if the weight distro is near 50/50 then it would be so sweet! :)
 
#33 ·
I'm looking at doing 255 20s all the way around. It doesn't seem to be an issue of fit running a bit wider in the front. And I am not concerned with day to day efficiency for my 5-10 miles of driving per day. But for trips I will still have the option of swapping to the staggered 19s if things look too out of hand.
I was hoping someone else was interested in the same but so far I'm not seeing that happen.
 
#34 ·
I'm looking at doing 255 20s all the way around. It doesn't seem to be an issue of fit running a bit wider in the front. And I am not concerned with day to day efficiency for my 5-10 miles of driving per day. But for trips I will still have the option of swapping to the staggered 19s if things look too out of hand.
I was hoping someone else was interested in the same but so far I'm not seeing that happen.
I re-evaluated this thought and decided to go 'standard' with the staggered fit for tires. I will play around when they come in and see if they can swap from to back with the aftermarket wheels..
Then if that actually works, sometime in the future I may do the square fit.🤷‍♂️
 
#37 · (Edited)
I'm looking to purchase snow tires for my AWD ID.4 (20-inch Drammen wheels) that is expected to arrive before winter.

Because snow tires in the staggered 20-inch sizes are quite expensive, it would be cheaper to purchase a separate set of smaller alloy wheels and tires.

Knowing that the 52 kWh RWD versions in Europe come with identical 18x8J wheels and 235/60 R18 tires on all four corners, I was thinking of getting a winter set in that size, which would also allow for tire rotation.

Apart from the effect of smaller wheels on handling (not a concern to me for winter driving), can anyone see any valid reason not to do this and stick with larger wheel sizes and/or staggered tires?

Thanks for your insights.

EDIT The other option would be to get 4 x 245/50 R20 tires, which are more reasonably priced. These should fit on both the front 8J and rear 9J wheels, being only slightly larger in diameter (0.3 inch) than the stock tires.
 
#38 · (Edited)
I'm looking to purchase snow tires for my AWD ID.4 (20-inch Drammen wheels) that is expected to arrive before winter.

Because snow tires in the staggered 20-inch sizes are quite expensive, it would be cheaper to purchase a separate set of smaller alloy wheels and tires.

Knowing that the 52 kWh RWD versions in Europe come with identical 18x8J wheels and 235/60 R18 tires on all four corners, I was thinking of getting a winter set in that size, which would also allow for tire rotation.

Apart from the effect of smaller wheels on handling (not a concern to me for winter driving), can anyone see any valid reason not to do this and stick with larger wheel sizes and/or staggered tires?

Thanks for your insights.
I can't see why not, but I'm not an expert! Keep us updated.

Edit: what wheels are you looking at? Will you prioritize weight or aerodynamics? Would be really cool to have light weight wheels that you can plop aero covers over for hwy driving.
 
#39 ·
There is no problem with going same size all around....reason for rear tires being more wide.
It is for handling and less tire wear vs front....and also to make better traction when full torque is applied from electric motor.
If spirited driving is not something you are after you will be good and even get less rolling resistance.
I have changed my rear summer set for same tires that are on front ...
Just take good research on aftermarket wheels....you want aerodynamic wheels and wheels that are rated for EV SUV weight (or go with another factory set)
 
#41 ·
There is no problem with going same size all around....reason for rear tires being more wide.
It is for handling and less tire wear vs front....and also to make better traction when full torque is applied from electric motor.
If spirited driving is not something you are after you will be good and even get less rolling resistance.
I have changed my rear summer set for same tires that are on front ...
Just take good research on aftermarket wheels....you want aerodynamic wheels and wheels that are rated for EV SUV weight (or go with another factory set)
Thanks!

One last question. I wonder whether slightly altering the relative diameter of front / back tires can interfere with traction control or other systems. In various stock configurations, there is a difference of up to 0.3 inches in diameter between front and rear tires (larger being in front). I assume this is negligible, but does anyone know if increasing the delta to 0.6 inches can potentially cause any issues? Eg, if I stick with the stock wheels and get 245/50R20 tires in front (29.6 inch diameter) and 255/45R20 tires in back (29.0 inch diameter). There are only two winter tires in the 235/50R20 size that I can find in the market, so I'm looking at alternatives...
 
#56 · (Edited)
I'm sure you're correct that the xDrive limitation is due to a mechanically coupled front and rear axles. My AWD Subarus had similar limitations.

My expectation is that there is more flexibility in an electric AWD system, and that it's not a factor in our RWD ID.4s. Stability control will compare left vs. right on an axle to look for traction problems, but I'd bet money that if there is any system function that compares front to rear wheel RPMs, any difference in rollout is pre-calculated automatically by the system the minute the car begins driving.
 
#57 ·
I ordered an AWD and assume it certainly does monitor front vs rear rotational speed for traction control, but indeed it would make a lot of sense that the system can automatically calibrate itself to adjust for different stock tire setups and other factors, given that the front and rear are decoupled in an EV.
 
#62 ·
I believe your recollection is correct, and here's the post with the details:

 
#64 ·
Hey everyone, so I've been reading this and I think I'm in the same boat as @crabnebula ... I want to mount Winter Tires on my ID4 RWD PRO S (as I'm also in Canada) - and I'm hoping to do a sqaure setup as it will be easier for me to rotate around (I believe most of the snows I've checked out are directional - so that would mean I'd be going through the rears faster) - so in essence ... from what I gather from @VW TECHNICIAN said...

245/50R20 x4 - NO Good

255/45R20 x4 - ? Would it clear the front side wells and prevent rubbing ?

How about 235/50R20 x4 ? Technically - I remember that narrower tires do better in snow, and having them all the same would allow me to rotate them around every year. Would that be possible - and yes 235 sizing is a PAIN to find sizes... 245 & 255 are way easier!

I'm hoping someone can figure this out as I've never had a staggered setup before and I usually use the OEMS for winter so I can put on something "other shoes" for the summer, thank you in advance!
 
#65 ·
You'd want 235/50R20 all around for a square winter setup. Skinnier is better in deep snow. More weight on a smaller section of tire will "cut" better.

But, 235 on the 9" rear wheel is a tiny bit of a stretch. The Pirelli Scorpion winter for our car says 6.5-8.5" width range is acceptable for this 235 size. I'm sure it's possible, but your sidewall would be a little stretched and it would be even less ideal for winter potholes.
 
#66 ·
You'd want 235/50R20 all around for a square winter setup. Skinnier is better in deep snow. More weight on a smaller section of tire will "cut" better.

But, 235 on the 9" rear wheel is a tiny bit of a stretch. The Pirelli Scorpion winter for our car says 6.5-8.5" width range is acceptable for this 235 size. I'm sure it's possible, but your sidewall would be a little stretched and it would be even less ideal for winter potholes.
Definitely agree with you on 20" setup.
 
#67 ·
Interestingly in the UK VW fit 8" wide alloys all round on all models except the GTX (which gets 9" wide on the rear).

The 52kWh models have 235 all round.
The 77kWh models have 255 on the rear.

I'm going to get a winter set and will definitely go for 8" with 235 all round might even go for steel on the winter set (as fitted by VW to the base trim).
 
#71 ·
Interestingly in the UK VW fit 8" wide alloys all round on all models except the GTX (which gets 9" wide on the rear).

The 52kWh models have 235 all round.
The 77kWh models have 255 on the rear.

I'm going to get a winter set and will definitely go for 8" with 235 all round might even go for steel on the winter set (as fitted by VW to the base trim).
One of the engineering points to go staggered setup was to make GTI experience in SUV and longer tire life on the rear.
Other than that if this is something you are not worried about...square setup will just do better and it will give you option to turn tires around for more tire life.
Heavy EV especially SUV style if driven hard around the curves will eat tires at much higher rate than lighter SUV.
And instant torque from electric Propulsion motor will take additional wear on the tires.
EV tires are still under development and they will require much more stiffer sides and stronger materials to prevent egg shape under various different side loads.
They are getting there but is fight between performance ,comfort and noise.
To stiff and comfort and noise are sacrificed.