16 vs 17 street/track wheels
09-04-2011, 07:25 AM
#1
Pro
Thread Starter
16 vs 17 street/track wheels
I want to make a set of street/track wheels using R888s tires and I have 2 opportunities to start from:
- Design 92 original wheels (6x16 front and 8x16 rear)
- Mille Miglia Cup1 (7,5x17 front and 9x17 rear)
Design 92s are much lighter (about 3 kg each) but they can receive thinner tires with taller side-walls. (205/55 front and 225/50 rear).
Cup1s can provide more rubber (225/45 front and 255/40 rear) and more precision.
The tires difference will also add a considerable difference in unsprung mass...
Given the R888s have pretty stiff side-walls, would you go through the weight way, or would you give more importance to the quantity of rubber and flex?
Ciao
- Design 92 original wheels (6x16 front and 8x16 rear)
- Mille Miglia Cup1 (7,5x17 front and 9x17 rear)
Design 92s are much lighter (about 3 kg each) but they can receive thinner tires with taller side-walls. (205/55 front and 225/50 rear).
Cup1s can provide more rubber (225/45 front and 255/40 rear) and more precision.
The tires difference will also add a considerable difference in unsprung mass...
Given the R888s have pretty stiff side-walls, would you go through the weight way, or would you give more importance to the quantity of rubber and flex?
Ciao
09-05-2011, 01:30 PM
#2
17
I want to make a set of street/track wheels using R888s tires and I have 2 opportunities to start from:
- Design 92 original wheels (6x16 front and 8x16 rear)
- Mille Miglia Cup1 (7,5x17 front and 9x17 rear)
Design 92s are much lighter (about 3 kg each) but they can receive thinner tires with taller side-walls. (205/55 front and 225/50 rear).
Cup1s can provide more rubber (225/45 front and 255/40 rear) and more precision.
The tires difference will also add a considerable difference in unsprung mass...
Given the R888s have pretty stiff side-walls, would you go through the weight way, or would you give more importance to the quantity of rubber and flex?
Ciao
- Design 92 original wheels (6x16 front and 8x16 rear)
- Mille Miglia Cup1 (7,5x17 front and 9x17 rear)
Design 92s are much lighter (about 3 kg each) but they can receive thinner tires with taller side-walls. (205/55 front and 225/50 rear).
Cup1s can provide more rubber (225/45 front and 255/40 rear) and more precision.
The tires difference will also add a considerable difference in unsprung mass...
Given the R888s have pretty stiff side-walls, would you go through the weight way, or would you give more importance to the quantity of rubber and flex?
Ciao
They may be heavier, but they are also wider and give you many more options for tire sizes.
With the 16's you can run 205-225 F and 225-245 R.
On the 17's you can run from a 215 to 245 F and 245 to 275 R.
Plus there are many more options for tires in 17 inch sizes. The number of 245/45/16 tires is dwindling.
Greg
09-05-2011, 02:23 PM
#3
Pro
Thread Starter
Greg,
I'm not quite sure that having more rubber gives more benefits than weighing 3/4 ks less each wheel.... plus, I prefer running not-too-wide rear tires because I like the car not to be understeering.
R888s are available in 16".
mmmh.... veeery confused...
Anto
I'm not quite sure that having more rubber gives more benefits than weighing 3/4 ks less each wheel.... plus, I prefer running not-too-wide rear tires because I like the car not to be understeering.
R888s are available in 16".
mmmh.... veeery confused...
Anto
09-20-2011, 08:52 AM
#4
I want to make a set of street/track wheels using R888s tires and I have 2 opportunities to start from:
- Design 92 original wheels (6x16 front and 8x16 rear)
- Mille Miglia Cup1 (7,5x17 front and 9x17 rear)
Design 92s are much lighter (about 3 kg each) but they can receive thinner tires with taller side-walls. (205/55 front and 225/50 rear).
Cup1s can provide more rubber (225/45 front and 255/40 rear) and more precision.
The tires difference will also add a considerable difference in unsprung mass...
Given the R888s have pretty stiff side-walls, would you go through the weight way, or would you give more importance to the quantity of rubber and flex?
Ciao
- Design 92 original wheels (6x16 front and 8x16 rear)
- Mille Miglia Cup1 (7,5x17 front and 9x17 rear)
Design 92s are much lighter (about 3 kg each) but they can receive thinner tires with taller side-walls. (205/55 front and 225/50 rear).
Cup1s can provide more rubber (225/45 front and 255/40 rear) and more precision.
The tires difference will also add a considerable difference in unsprung mass...
Given the R888s have pretty stiff side-walls, would you go through the weight way, or would you give more importance to the quantity of rubber and flex?
Ciao
on 7 & 8 x16 you can use Toyo RA1 225/50 & 245/45 tires w/ the same wheels & R888 you could use 225/45 or 205/55 or 225/50 fronts and 245/45 rears
09-21-2011, 04:33 PM
#5
Pro
Thread Starter
in the past few days I've made a simple test: III gear from 2000 to 5000 rpm.
- Mille Miglia Cup1 7,5x17 and 9x17 with Bridgestone S02a 205/50 fronts and 255/40 rears: took 7,9 seconds
- Design 92 6x16 and 8x16 equipped with Pirelli P-Zero 205/55 fronts and 225/50 rears: took 7,5 seconds
0,4 sec. is 5%... significant difference! BUT the feeling at the wheel was much better on the 17s... probably due to tire difference?
@ Bill,
I know well the difference on bicycles wheels...! 3 years ago I bought a set of Campy Bora: the first time I used them, I had the feeling of someone pushing me from behind
UGE difference!
- Mille Miglia Cup1 7,5x17 and 9x17 with Bridgestone S02a 205/50 fronts and 255/40 rears: took 7,9 seconds
- Design 92 6x16 and 8x16 equipped with Pirelli P-Zero 205/55 fronts and 225/50 rears: took 7,5 seconds
0,4 sec. is 5%... significant difference! BUT the feeling at the wheel was much better on the 17s... probably due to tire difference?
@ Bill,
I know well the difference on bicycles wheels...! 3 years ago I bought a set of Campy Bora: the first time I used them, I had the feeling of someone pushing me from behind
UGE difference!
09-21-2011, 07:49 PM
#6
in the past few days I've made a simple test: III gear from 2000 to 5000 rpm.
- Mille Miglia Cup1 7,5x17 and 9x17 with Bridgestone S02a 205/50 fronts and 255/40 rears: took 7,9 seconds
- Design 92 6x16 and 8x16 equipped with Pirelli P-Zero 205/55 fronts and 225/50 rears: took 7,5 seconds
0,4 sec. is 5%... significant difference! BUT the feeling at the wheel was much better on the 17s... probably due to tire difference?
@ Bill,
I know well the difference on bicycles wheels...! 3 years ago I bought a set of Campy Bora: the first time I used them, I had the feeling of someone pushing me from behind UGE difference!
- Mille Miglia Cup1 7,5x17 and 9x17 with Bridgestone S02a 205/50 fronts and 255/40 rears: took 7,9 seconds
- Design 92 6x16 and 8x16 equipped with Pirelli P-Zero 205/55 fronts and 225/50 rears: took 7,5 seconds
0,4 sec. is 5%... significant difference! BUT the feeling at the wheel was much better on the 17s... probably due to tire difference?
@ Bill,
I know well the difference on bicycles wheels...! 3 years ago I bought a set of Campy Bora: the first time I used them, I had the feeling of someone pushing me from behind
UGE difference!w/ bicycles most 700s are the same rolling radius but changing from 19mm to 18mm and Mavic Open Pro to Ksyrium SL, using the same tire type made a night & day difference in pedaling effort over the same 30mi loop that I do daily
