Gotcha. So basically, the 15x10 with 245/40 RC1s should be just fine with 2.5" springs.

 

Pictures of 15X11 front fit.

 

Why not offer a 8.5, 9.5 and 10.5? I think you could sell more volume of each by eliminating the 11 which probably won't sell well.

 

This has me thinking now. I have David de Regt's (Codingparadox) old set of FCM double adjustables from before he went to the elise. The shock bodies are standard bilsteins that have been modified, and I believe that they use a 46mm piston and 14mm shock shaft. Unfortunately they use a coilover sleeve over the shock body and afaik forces me to use a 2.5" ID spring. I've been trying to research fitting the components into the bilstein ASN shock bodies. Seems like it would work, and there's already a schrader valve at the base for the remote reservoir.

I guess I should talk to Shaikh about doing the conversion and if it can work. Might as well get the maintenance done and a revalve at the same time.

 

I am not sure if you are serious or that it's meant as a joke. But no, we will not be doing half sizes and the 11's are selling quite well.

 

No, I was being serious. Take for instance a Hoosier R7(one of the widest tires available per size). The 205 50 15 is recommended by Hoosier for a 7.5 inch wheel max. The 225 45 15 is recommended for a 8.5 inch wheel max. Can you use a wider wheel? Sure. Does it work? Sure. But...Hoosier doesn't recommend it.

The Hoosier is significantly wider than the NT01. I had rubbing issues with a R6 on a 7 inch +30 offset wheel and the NT01 clears with room to spare.

Again, I know you're comfortable with recommending a wheel wider than the manufacturer suggests and that's your prerogative but from a consumer standpoint, according to Hoosier(and other manufacturers), the 8.5 and 9.5 wheels would fit more tires "correctly".

 

205/50-15 has an 8" section width so....

 

Again, this might be a case of the manufacturer erring on the side of caution or it might have to do with allowing the tire to flex and operate according to design specs.

We don't have any tire manufacturers posting here to state one way or the other.

 

Lol adding half sizes won't sell very many more wheels, at best he would just have to order less of the current offerings and have to mess with 3 more part numbers to design/order/keep stock of.

Emilio,

Why no 10.375" wheels?

 

Your assertion is based on an incorrect assumption that because Hoosier does not recommend it, it is slower.

We sell the widths we sell because each is fastest for the target tire size. You need to ignore the tire industry recommendations written by lawyers. When I talked to the engineers at Hoosier back in 2009 when planning our 15x10, I was told the "275 would work best on a 15x10, 15x11 would be too wide". That engineer was wrong.

So no, half size widths would not be advantageous to use as a business and would only benefit a scant few with fitment.

For Hoosiers, I would stick with the sizes we offer for every tire except maybe a 9.5 for the 225/45/15. For non-Hoosiers our 15" widths are perfect across the board.

Notice my signature. Stated this maybe 50x over the last ten years on forums all over, but here it is again:

For max performance with a radial, the wheel should be equal to or slightly wider than the actual tread.

- Tread width, not casing width
- Actual tread, not what is published on the mfrs website (Hoosiers are wider tread than what is published)

 

2 sets bought and paid for

 

Sorry to be so didactic but I find it easier just to be direct.

 

I must be missing something...???

Nevermind.
You were referring to an earlier post.

 

So, what is the Actual Tread width of a 245/40-15 Maxxis Victra RC-1?

 

Tread is close to 10 but the actual part that touches the pavement is 9.4". So I call that 9.4". Maxxis website shows 9.8 section, measured on an 8.5" wheel. Useless info and why I stress getting an actual tread width measurement.

 

Awesome, thanks. So, applying Emilio's rule, the wheel should be 9.4" or wider, hence the 10" wheel recommendation. Now I understand.

Before I knew the actual tread width, I couldn't understand why a 9" 6UL wouldn't be optimal, as surely any tire with a section width of 9.8" must have a tread width of 9" or less.

On another note: is it a fair measurement to roll the car through a puddle of water, then measure the tire track made by the wet tire to obtain actual tread width? The idea being, with the tire mounted on the wheel, the wheel on the car, and the driver in the car, a true contact patch is achieved.

 

You're over thinking it. Tire rolls back and forth under cornering loads so the entire contact patch is only being loaded under max braking and then only on the fronts. Just measure a worn tire, or stick to known recommendations.

 

Emilio, any chance of more colors being available for the 15x10 down the road? Perhaps a Nickel option?

 

Tungsten and nickel are the same color. Tungsten is just a bit darker.

 

Looks significantly darker on the site, I'll have to google some pix of them on a Titanium NB/MSM.

Thanks!