Member Since: 24 Mar 2009
Location: North Yorkshire
Posts: 234
Rim Widths, What difference does it make?
Having sold the D3 and moved up to a D4 I had to sell the 18" wheels with the trusty AT2's as they don't fit the D4. So now I'm looking for a second set of 19" wheels to attach the appropriate AT or winter tyres to. Not made my mind up yet as to whether I'm going for GG AT's or Vredesteins, but that's another topic There appears to lots of RRS wheels available but not many D3 / D4. I've read all the literature on the forum about what fits and what doesn't and all about the different wheel load ratings. Although it's often mentioned that the RRS wheels are wider than the Disco wheels I don't recall there being any discussion / explanation as to what "Effective" difference running the same size tyre on the wider rim makes. I know that Porsche were the first manufacturer to do this many years ago before the introduction of low profile tyres and this give the car less roll during cornering and made the tyre less likely to roll off the rim during racing conditions, but what advantage / disadvantage does it give to us Discovery users?
19th Dec 2011 10:25 am
Bodsy Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
I ran MTR's on RRS wheels for a while, seemed to be slightly more stable than on the std hse whels and yoiu could notice the difference when looking at them side by side. the tyre rim is slightly wider which means slightly less protection for the wheel itself.Bodsys Brake Bible
Are they wider out the way or wider in the way? Wider in the way can foul on steering and brake components and wider out the way on wing, and also on the chassis leg protrusion (or has that been reduced on a D4).A vaccine does not stop you catching a virus, or passing it on, or getting ill from it, really ill. It does reduce the likelyhood of you dying when really, really ill. Stay Alive - KEEP AWAY FROM PEOPLE.
19th Dec 2011 1:05 pm
Bodsy Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
No problem at all with fouling anything. Remember that 19" wheels are fairly limited in tyre choice, not heard of any fouling so far.
I have 2 x RRS HSE wheels with D3 spec tyres if you want to have a play around to check fitting etc.Bodsys Brake Bible
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19th Dec 2011 1:14 pm
SJ
Member Since: 24 Mar 2009
Location: North Yorkshire
Posts: 234
Re; your earlier reply about less protection for the wheel itself. I wonder if that's why nearly all of the RRS wheels advertised have been kurbed to a greater or lesser degree, whereas you don't see many kurbed D3/4 rims
Last edited by SJ on 19th Dec 2011 2:24 pm. Edited 1 time in total
19th Dec 2011 2:04 pm
Bodsy Site Sponsor
Member Since: 06 Nov 2006
Location: In the Clubhouse
Posts: 21361
oh my d3 rims have seen their fair share of kerbs (whel not kerbs, but certainly of road nics!) Bodsys Brake Bible
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19th Dec 2011 2:21 pm
SN
Member Since: 03 Jan 2006
Location: Romiley
Posts: 13710
I've also been running RRS rims for a couple years (with MTR's) and they look 'stocky'. Recently swapped one temporarily for a D3 HSE rim, also with an MTR, and I'm amazed at the difference, I keep looking at it thinking its going flat, but it isn'tSteve N | 21MY Defender | 08MY Discovery 3 (history) | 06MY Discovery 3 (ancient history)
24th Dec 2011 8:33 pm
Bob.
Member Since: 05 Apr 2009
Location: 52�N 2�W
Posts: 94
19" D3 wheel is 8" wide but RRS 19" is 9" so as standard tyre is 255mm for both it will be more "bulged" on a D3 rim.
RRS 19" run 50% aspect ratio against 55% for D3 (ie sidewall not so tall) for normal road tyre so maybe a little more prone to kerbing on the RRS?
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to a D4 I had to sell the 18" wheels with the trusty AT2's as they don't fit the D4. So now I'm looking for a second set of 19" wheels to attach the appropriate AT or winter tyres to. Not made my mind up yet as to whether I'm going for GG AT's or Vredesteins, but that's another topic 
There appears to lots of RRS wheels available but not many D3 / D4. I've read all the literature on the forum about what fits and what doesn't and all about the different wheel load ratings. Although it's often mentioned that the RRS wheels are wider than the Disco wheels I don't recall there being any discussion / explanation as to what "Effective" difference running the same size tyre on the wider rim makes. I know that Porsche were the first manufacturer to do this many years ago before the introduction of low profile tyres and this give the car less roll during cornering and made the tyre less likely to roll off the rim during racing conditions, but what advantage / disadvantage does it give to us Discovery users?
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