I hate front wheel drive, send most torque to the rear, please
On 2/28/14, 14:48, -hh wrote:

-hh
I hate front wheel drive, send most torque to the rear, please wrote:

I hate front wheel drive, send most torque to the rear, please
Pothole resilience is more dependent on how thoroughly sidewall is designed on a particular tire model.

-hh
Agreed, although there's also crossover into the tire diameter and rim size, as these determine "how much room" you have to work with for your sidewall design. Plus other factors such as what effective spring rate the sidewall design is intended to have.

I hate front wheel drive, send most torque to the rear, please
(I guess) the lower you go in profile though the more manufacturer tries to save on sidewalls to keep the tire weight down so (I guess) 2 ply sidewalls are rare if at all obtanium on semislick 30-35 profile rubber bands.

-hh
IMO, it is not a "materials cost" question.

The tire dimensions affect tire patch area, which influences handling performance. Similarly, the sidewall also influences performance ... one can see how a shorter & stiffer sidewall would make things more rigid - - and less movement of the tire patch relative to the vehicle (a "less wiggly" tire).

However, going to a smaller sidewall carries connotations that there's less distance for elastic defection from impacts (e.g., potholes) and a stiffer sidewall similarly makes it more prone too (less pliable = less likely to be as fully elastic across the same range, etc).

I hate front wheel drive, send most torque to the rear, please
(I guess) its the exact same deal with haldex "awd": the crap does not work (well if at all), but, since populace is not particularly sophisticated, manufacturers get away with it.

-hh
Yup. Another factor is product styling - - there's a good number of consumers who prefer the appearance of larger rims / smaller sidewalls without appreciation of their trade-offs.

I hate front wheel drive, send most torque to the rear, please
If you go far enough in the past 80 was considered "low profile" but I guess you'd be hard pressed to find 80s and 90s outside the trucks domain today.

-hh
Yes, an 80 sidewall on a US automobile (not truck) would be ancient. Recent vintage stuff here - especially anything that even smells of performance is usually all below a 60, particularly since rim sizes have gone up. For example, one of the tire sizes that I'm running right now on one of the vehicles is a 225/45R17 and if I were to mention that at a social gathering, I'd probably have no one blink at the 45 sidewall ... they would be more likely to comment about the 17" rim being "small" and that they're running a 19" or 20" ... maybe even a 21" rim.

I hate front wheel drive, send most torque to the rear, please
Would they they'd be forthcoming to discuss what piece of shit rubber they had to outfit that 18-20 incher with? The prices escalate pretty rapidly from 17" onwards. They are noticeabley higher for 16"ers than 15" but the difference gets progressively higher as you migrate toward the larger rims. If anyone gets cocky and the situation presents itself try to discuss the model they've got and how much they paid for the set. I'm not sure Fen CHi Gen Xian Tire would be a bragging topic.

-hh
Granted, such casual comments usually ignore differences in overall wheel/tire OD, so the amazing shrinking sidewall issue isn't quite literally so extreme, but they're certainly not as tall as they were some years ago, which in conjunction with our degraded infrastructure is resulting in more blow-outs and damaged rims ... BTW, this is also something that is being made worse by "Run Flat" tires, as they have even stiffer (less forgiving) sidewalls: I have one colleague with a ~2011 BMW 335i who in the first two years that he owned the car, had IIRC ~7 run flat tire blowouts and 4? damaged rims. Thank you BMW for a ridiculously small 35 sidewall (30 rear) coupled with a stupid tire design on what's supposed to be a "Daily Driver". For the operating expense of this, figure roughly US$600 per tire after the new car's supplementary two year tire insurance policy ($2000+) expires. Oh, and the wheels are usually not well covered by such policies, so he had to spend another $2K out-o

I hate front wheel drive, send most torque to the rear, please
f-pocket for four replacement rims.

The OD pretty much stays the same plus minus half an inch or so. I would've gotten a set of stamped steelies after the second incident and would've put a ~55 profile rubber on them. In fact I run 235 55R17 in summer and am planning shifting to 205 65 R15 this summer as those all seasons show their age in wear. Did I mention occasional new england alike moonscape roadways around here and fucking morons with the civil engineering degrees tethered to a fucking idiot in the mayor's office?

And $600 per TIRE? That fucking thing must be hand made of natural rubber. Is iphone 5c included?