Dunlop Direzza
5 posts
• Page 1 of 1
[url]http://www.tirerack.com/tires/tires.jsp?tireMake=Dunlop&tireModel=Direzza+ZII&partnum=86HR4Z2&vehicleSearch=false&fromCompare1=yes/url]
anyone running these
anyone running these
Born, and brought home from the hospital (no seat belt (wtf)) in a baby!
Find out where the limits are, and start from there
Love your Mother
Earth
Find out where the limits are, and start from there
Love your Mother
Earth
-
h20hamelan - Coveted Fifth Gear
- Posts: 1950
- Joined: 25 Sep 2010
One low profile size in 14" and the rest in 15"-18"? Nope!
Mechanical Engineer, happily retired!
'67 S3 SE FHC
See Facebook page: W J Barry Photography
Put your money where your mouse is, click on "Support LotusElan.net" below.
'67 S3 SE FHC
See Facebook page: W J Barry Photography
Put your money where your mouse is, click on "Support LotusElan.net" below.
-
Galwaylotus - Coveted Fifth Gear
- Posts: 1348
- Joined: 01 May 2006
185/60-14 is the common tyre size for those who upgrade to 14" Minilites. Its rolling diameter (917 rev/mile) is a touch smaller than our more common 155-13 (912 rev/mile).
The 165-13 tyre is 887 rev/mile. To get close to that, you would need 195/55-15 tyres (892 rev/mile) but these are two lbs heavier than the 185/60-14 tyre.
All this is of academic interest only for S1-S3 Elans, since they have difficulty in accommodating 155-13 tyres under all circumstances. S4 and later Elans ans +2s might be OK.
Also note that the 185/60-14 is H rated, the others are V rated.
David
1968 36/7988
The 165-13 tyre is 887 rev/mile. To get close to that, you would need 195/55-15 tyres (892 rev/mile) but these are two lbs heavier than the 185/60-14 tyre.
All this is of academic interest only for S1-S3 Elans, since they have difficulty in accommodating 155-13 tyres under all circumstances. S4 and later Elans ans +2s might be OK.
Also note that the 185/60-14 is H rated, the others are V rated.
David
1968 36/7988
-
msd1107 - Fourth Gear
- Posts: 848
- Joined: 24 Sep 2003
msd1107 wrote:Also note that the 185/60-14 is H rated, the others are V rated.
I somehow can't believe that's very relevant to our unmodified Elans. With a top speed of less than 118mph we should be well within the T speed rating considering the low (750kg) mass of the Elan. Remember that the speed rating is based on sustained speed at the rated load of the tyre.
Mechanical Engineer, happily retired!
'67 S3 SE FHC
See Facebook page: W J Barry Photography
Put your money where your mouse is, click on "Support LotusElan.net" below.
'67 S3 SE FHC
See Facebook page: W J Barry Photography
Put your money where your mouse is, click on "Support LotusElan.net" below.
-
Galwaylotus - Coveted Fifth Gear
- Posts: 1348
- Joined: 01 May 2006
Good point. Tyres are rated based on maximum load weight and tyre pressure. The maximum sustained speed will increase if the load is decreased or if the tyre pressure is increased.
However, the speed rating is a general indication of tyre construction. A V rated tyre will generally have higher performance ratings (cornering, braking, etc) than its stablemate rated at S, H, or T.
This is generally of no concern in normal driving conditions. However, it is the outlier conditions (max braking necessary to avoid a crash, max cornering to evade an obstacle) where the higher rated tyre rewards its greater cost. As long as you do not get involved in dicy driving conditions, do not worry about these things. I always get higher speed rated tyres, although I do not plan on needing their capabilities.
David
1968 36/7988
However, the speed rating is a general indication of tyre construction. A V rated tyre will generally have higher performance ratings (cornering, braking, etc) than its stablemate rated at S, H, or T.
This is generally of no concern in normal driving conditions. However, it is the outlier conditions (max braking necessary to avoid a crash, max cornering to evade an obstacle) where the higher rated tyre rewards its greater cost. As long as you do not get involved in dicy driving conditions, do not worry about these things. I always get higher speed rated tyres, although I do not plan on needing their capabilities.
David
1968 36/7988
-
msd1107 - Fourth Gear
- Posts: 848
- Joined: 24 Sep 2003
5 posts
• Page 1 of 1
Total Online:
Users browsing this forum: No registered users and 25 guests