Nissan Primera P11-144. Wheel and tyre sizes.
Printed From: Nissan Primera Owners Club
Category: General Open Forums - NO TRADING!
Forum Name: Nissan Primera Help & Queries
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URL: http://www.npoc.co.uk/forum/forum_posts.asp?TID=79319
Printed Date: 16 Apr 2024 at 10:31pm
Topic: Nissan Primera P11-144. Wheel and tyre sizes.
Posted By: JagBolt
Subject: Nissan Primera P11-144. Wheel and tyre sizes.
Date Posted: 25 Nov 2017 at 12:38pm
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Hello everyone, I wonder if anyone can throw any light on the information contained in the Nissan Primera P11-144 owner's handbook, with reference to wheel and tyre sizes. It specifies two 15" wheel types, steel or alloy. Both types of wheel are exactly the same size, (6J x 15 ET45) yet different tyre sizes/speed ratings are specified for steel wheels as opposed to alloys. Steel: 185/65HR15 Alloy: 195/60VR15 or 195/60R15 (I'm not sure why no speed rating is shown in the latter alloy tyre choice, but that's exactly how it's shown in the manual). I can't understand why this is so for the same size of wheel. Why should a change of material mean a different tyre size and speed rating? My car is fitted with alloy road wheels and steel spare, tyre sizes as per the manual. I'd rather fit 185/65 tyres to the road wheels so that they're the same as the spare and because they're a bit cheaper. I can't see a problem with this. Can anyone else?
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Replies:
Posted By: roy.2
Date Posted: 25 Nov 2017 at 6:18pm
Hi JagBolt. You would be better asking a tyre fitting place as for why that is.  I would say you fit the tyres you like as long as they are the same size on each axle.  ------------- Roy |
Posted By: surreyGT
Date Posted: 25 Nov 2017 at 7:23pm
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You can fit various sizes, 185/195 etc refers to the tyre width and the 65/55/50 refers to the aspect ratio (profile). If you fit a lower profile on the same width your tyre size effectively gets smaller and your speedo will over read slightly. Details here: https://www.blackcircles.com/general/tyre-size-calculator I'd expect 185/65/15 are similar size to 195/60/15 hence makes no difference, I'd say fine for a 1.6 or 1.8 but you need wider for a 2.0. I've had a dozen or so Primera's over the years and I change tyres regularly as they get worn out quickly on track use. On the same GT's I've tried 195/60/14, 185/55/14, 185/50/14, 195/65/15, 195/55/15 and 195/50/15 (prefered choice) and 195/45/15 and 205/50/16's. I run lower profile tyres than standard on track as it gives better turn in on track, only difference on the road is gearing and the speedo reading goes up if wheel diameter is lower. 185/65 is relatively narrow with a tall profile, this gives good ride over bumps and pot holes but makes the car feel more soft/vague on corners. Should also be good in the snow if we ever get any. ------------- in the garage P11 GT back on road/track P10 eGT immaculate road car BMW 130i sport (for wife) 350 Z new track car 2003 Swift GTi mk2 racing car 89' Celica St162 GT coupe 1988 Several other 3.0 BMW's |
Posted By: JagBolt
Date Posted: 26 Nov 2017 at 10:26am
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http://www.carbibles.com/tyre_bible.html" rel="nofollow - http://www.carbibles.com/tyre_bible.html is my favourite resource for all things wheel and tyre related so I'm well aware how tyre sizing works and the affect of different set-ups on handling and performance. I just don't understand why Nissan would specify different tyre sizes and speed ratings, when the only wheel difference is the material it's made from. Perhaps they assume that a driver with alloy wheels would adopt a sportier driving style! As surreyGT said, there's little difference between 185/65/15 and 195/60/15 tyres anyway. Both are perfectly acceptable mid-range sizes for 6" rims. I don't think I'll be asking tyre fitters for advice. Usually they just go straight to their computers anyway and look up the same information that anyone can. Otherwise, five different tyre fitters will give five different opinions.
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Posted By: JagBolt
Date Posted: 04 Dec 2017 at 4:05pm
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In the end I had four Firestone TZ300 185/65 R15 88H tyres fitted at Halfords Autocentres. £44.99 each fully fitted. In addition, Halfords are doing a special offer on Firestone tyres at the moment. For two or more Firestone tyres bought, you can claim Argos vouchers. For 15" tyres it's £5 per tyre, reducing my tyre cost to £39.99 each. Bargain! (Well it is until I go and spend loads of money at Argos simply to use up my vouchers).
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Posted By: essNchill
Date Posted: 04 Dec 2017 at 7:31pm
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One of our old forum apps.. http://www.npoc.co.uk/forum/tyrecalc.asp" rel="nofollow - http://www.npoc.co.uk/forum/tyrecalc.asp
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Posted By: samuraik5
Date Posted: 04 Apr 2019 at 10:34am
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Hi Guys, I am new to this club & looking for a User/Owners manual of Primera P11 2.0 AT.. May be I'm posting this in a wrong place. Seems I have limited access to the forums here..If someone has manual, plz email to Shivmails@gmail.com Would be helpful to me. Thanks... |
Posted By: p11primeragt
Date Posted: 05 Apr 2019 at 8:24pm
http://www.npoc.co.uk/forum/nissan-primera-factory-service-manuals_topic29493.html |
samuraik5 wrote:Posted By: samuraik5
Date Posted: 06 Apr 2019 at 7:19am
| Hi, Thanks for the reply. It seems the link is of Service manual. Plz post some source of User/Owners manual too.. |