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Post by blaxy on Nov 19, 2015 14:19:57 GMT
Graham,
You seem to have a lot to deal with all in one go, so perhaps you are right about starting a new thread.
I seem to remember that there was an interesting thread about tyre pressure and road speed on the Old Forum last year! For what it’s worth, I run my tyres with an extra 2 lb/sq.in., all round (24psi) as there is always just the wife and I in the car. As Cooper said the 155 80R/14 Radials are smaller diameter than the original Cross Ply’s and therefore my road speed is less than that indicated by the speedometer. Although I haven’t been out with the satnav to check the road speed, I have done speed comparisons and it appears that the speedo seems to indicate 5mph or so higher.
Dave
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Post by canuck on Nov 19, 2015 23:00:21 GMT
Dave I think your tire pressures are good. I inflate mine to 24 front 26 rear, just seem to feel right with this. Do you have a MK 3 or the 'jacked up' MK 1 like Graham and myself? I apologize for repeating myself but I think you chaps are running a tire that is not suited to the narrow standard road wheel of the Riley. Each tire size calculator linked to on this discussion clearly shows this. The main reason I have trundled about for 4 seasons on cross-ply tires is exactly that. I am quite concerned of the tire rolling off of the rim in a hard n fast corner situation. Either you chaps are careful, or lucky or I am out in left field with my concern. Knowing what my road speed is or that indicated on the speedometer dial is not a concern to me. Like you Dave I used my TomTom to establish the speeds just to keep the gendarme off my tail.
Salut B
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Post by blaxy on Nov 21, 2015 17:28:07 GMT
Bruce,
My One Point Five is a Mk II. I don’t do ‘Hard and Fast’ cornering but she does perform quite happily on Motorways and at 60-65 mph keeps up with all but the fastest traffic. While I maintain a good distance from the vehicle in front (original drum brakes fitted) we do not shy away from overtaking slower traffic when required!
Dave
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Post by canuck on Nov 22, 2015 17:05:49 GMT
Bruce, My One Point Five is a Mk II. I don’t do ‘Hard and Fast’ cornering but she does perform quite happily on Motorways and at 60-65 mph keeps up with all but the fastest traffic. While I maintain a good distance from the vehicle in front (original drum brakes fitted) we do not shy away from overtaking slower traffic when required! Dave Dave, I drive just as you do. Over here in the colonies we are 'plagued' with motorways and these are difficult to avoid. Well understood of course all Black Riley perform 'quite happily'. I also have the OE drum brakes and these do the job just fine. I can lock the wheels in a panic situation, ask me how I know this? Could I do this with a larger tire? I will find out one day when I have some other tires installed. I think the underlying message here is be aware that these are old cars that when matched to modern vehicles have some 'distinguishing' manners.
Sadly we have not been able to answer Graham initial question.
Bruce
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Post by blaxy on Nov 23, 2015 13:23:45 GMT
Bruce, You are right of course, we haven’t really answered Graham's initial Question (although I think we have got close to it). As previously mentioned by a member, I also think the best advice would come from Charles Ware's Morris Minor Centre. Here is the link to his FAQ’s, www.morrisminor.org.uk/index.php/faq.html#tyresize - which includes radial tyre sizes and running pressures. By the way Bruce, I love the photo at Watkins Glen, any chance can you send me a link for it please? Dave
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Post by wunpointfyve on Apr 27, 2016 21:43:31 GMT
I know I'm late with this, having only just joined. But 20 years ago I used 165X14s on Mk 3 rims with no problems. 24psi all round.
I also used to have a converted car (a/roll, lowered, with 13x5.5 rims). These took 185/70 tyres, and had an offset (not spacers) enough to clear the track ends. But full lock could (just) foul the wings. It completely changes the original (well thought-out) suspension geometry, though. It was also a harsher ride than I'd want nowadays, but probably OK on a smooth track. You can still get Minilites of these dimensions, I think, possibly for MM racers. And you have to check clearance if fitting (say, Marina-type) disc brakes and/or Koni shockers.
I'd never go down the MGB wheel route: PCD adapters plus spacers seem unsafe trouble.
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Post by Mabel on Oct 5, 2016 16:47:29 GMT
I've been revisiting this ancient thread as tyres (or tires for those in far flung places) need attending to.
It looks as though my tyres have a date stamp on 05/06.......that means I'm running on tyres that are 11 years old. Whilst there's so much thread left I'm concerned about the actual state of the tyre. There's no visible cracking but that doesn't mean that there ate no under-lying problems - these could be lurking somewhere and I'm not prepared to take a chance and assume that everything will be OK.
So, once Mabel is back in the UK, I'll be looking at changing the 11 year old 165/14s to new 145/14s. Now, with or without an inner tube? Any thoughts anyone?
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Post by canuck on Oct 6, 2016 19:46:01 GMT
I've been revisiting this ancient thread as tyres (or tires for those in far flung places) need attending to. So, once Mabel is back in the UK, I'll be looking at changing the 11 year old 165/14s to new 145/14s. Now, with or without an inner tube? Any thoughts anyone?
Graham, At 11 years old these are ancient tyres (or tires for those in far flung places) it would appear also!
I am still in search mode to replace George tires. I am working on, (very slowly) replacing the Riley 3" wide wheel with early MGB wheels @ 4" wide. The PCD is different but I can buy adapters to compensate. adaptitusa.com/4-x-4.00-to-4-x-4.50-wheel-adapter.aspx
If this exercise doesn't work out I will order wider wheels from a Morr*s M*n*r van pick up @ 4.5" wide and correct PCD. These are currently not available but after speaking with the chaps at ESM there is a batch being produced.
As usual I choose to complicate things, I wish I had your ability to quickly decide as you have.
Good decision to replace Graham.
B
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Post by Mabel on Oct 8, 2016 18:14:58 GMT
Bruce.....your last sentence seems to indicate replacing Graham.......i'm happy as I am thank you.
I'll let you know how I get on down at our local and very good independent tyre (tire) suppliers. Won't be for a few weeks though I guess.
On the point I raised I wonder how many of us are running what appear to be a decent set of tyres but in reality are being used beyond their use by date.
Speaking to a chap I know out here in France (runs a Volvo Amazon) and who used to be at one time a trained Police Driver in the UK, he considers that 4/5 years is the most that tyres should be used for. After that they should be replaced regardless of the mileage undertaken.
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Post by canuck on Oct 9, 2016 21:14:42 GMT
Bruce.....your last sentence seems to indicate replacing Graham.......i'm happy as I am thank you. On the point I raised I wonder how many of us are running what appear to be a decent set of tyres but in reality are being used beyond their use by date.
Graham, My apologies, I like you as you are as well! Yikes, you are right about how important a comma is. I must have missed that day at school!
Yes date codes on these tires is mega important hence the government (S) mandating this. This side of the pond 7 years is the expected safe life of a tire with tire shops not allowing +10 year old tires to be installed. This 'economy' is exacerbated by us being mandated to wear winter tires from Dec 15 to March 15 so even our daily driver family 'trucksters' will outlive the date codes of the tire tread. Very good situation for the tire manufacturers. With my ongoing search of tires a recent request with a vintage tire supplier turned up that the tires I enquired after were already 3.5 year old sitting on their rack. With the manufacturer not predicting another production run for 18 months forward. This suitable tire availability in vintage sizes is a bugg*r, hence my thinking the ultimate solution of a wider wheel to fit 'modern' size tires will allow one to find a 'current' build date tire. FWIW tires in 14" diameter are becoming rare over here with so many new vehicles being 16", 17" even 20" diameter wheels installed.
If the tire you finally buy is a tubeless tire, dispense with an inner tube. The Riley wheel is suitable to tubeless installs.
B
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ianhr
New Member
Posts: 17
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Post by ianhr on Oct 13, 2016 2:00:38 GMT
Mine is equipped with Pirelli P4 165 R 14 on the front and Motomaster (Canadian Tire brand I think) XTS P175/75 SSR 14 M&S on the rear. Came to me that way and there doesn't seem to be any undue rubbing. Don't know if the wheels are stock, and sadly, the previous owner recently passed away, so I can't ask. For what it's worth...
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Post by canuck on Oct 15, 2016 12:07:17 GMT
Ian, I suggest you verify the date code on those tires installed on your Riley.
Neither of those tires have seen production for a great many years.
Heed Graham advice.
B
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ianhr
New Member
Posts: 17
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Post by ianhr on Oct 15, 2016 19:05:17 GMT
Where do I look for that? The tires still look new, but the car has always been garaged since the last owner bought it.
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Post by canuck on Oct 15, 2016 20:47:59 GMT
Where do I look for that? The tires still look new, but the car has always been garaged since the last owner bought it. Ian, Have a read here,
www.tirebuyer.com/education/how-to-determine-the-age-of-your-tires?SSAID=389818
this is the problem with our little cars, they don't get driven enough to use up the tire. Fortunately I have successfully worn out a set of tires on George, (25K miles ) of course these are crummy crossply tires. Any modern tire we find will not loose tread before its best before date. Such as it is ...............
B
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Post by Mabel on Oct 19, 2016 14:03:38 GMT
Just had a chat with our local independent tyre supplier. He suggests using 155x14 simply on the basis that is the size used by the Charles Ware Morris Minor Centre here in Bristol......and they have the same wheel size. Looking on their site this is indeed what they say. They also make the point that the 145 size is the only one that fits in the where the spare wheel is held on the Morris Minor Saloon although the traveller can take the 155s. I've no idea if that's the same with our cars. Anyone care to comment on that.
If 155s fit, then as a set of five of those is around about £50 cheaper (including fitting) than 145s and given the Morris Minor Centre is recommending this size (I guess there have been no problems with cars using 155s) then that's the route I may well adopt. No decisions yet made.
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