Post by: sgd37 on July 05, 2017, 07:34:38 PM
I'd like to replace the tyres that came with the bike. So the manual says it takes front/back 3.25-19 /3.5-18 but I don't know what speed or weight rating I should go for. From the research I've done the Heidenau K34 seem to be the most appropriate.
Does any one have any recommendations? Can I fit a 3.5-19 on the rear wheel?
Much appreciated
Post by: hairygit on July 05, 2017, 07:41:51 PM
Post by: Colonial-Clive (yindi) on July 05, 2017, 08:07:04 PM
Post by: sgd37 on July 05, 2017, 08:27:35 PM
Post by: hairygit on July 05, 2017, 08:31:11 PM
Post by: sgd37 on July 05, 2017, 08:54:44 PM
https://www.oponeo.co.uk/moto-tyre-details/heidenau-k34-3-50-18-62-s-front-rear-tt-m-c#148861762
Post by: hairygit on July 05, 2017, 09:24:41 PM
Post by: sgd37 on July 05, 2017, 09:56:09 PM
Post by: JamesH on July 05, 2017, 10:38:40 PM
M&P do good deals on a pair...
https://www.ebay.co.uk/itm/141307000267
Post by: Johnwebley on July 06, 2017, 06:20:10 AM
Really good
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Post by: MCTID on July 06, 2017, 07:32:37 AM
I gave up trying to buy K70's for my CB750K4....it's a long story which lasted many months....and eventually bought Avons from Vintage Tyres.
A competitive price and they arrived next day with free P & P.
Only drawback was the cost of having them fitted to my loose wheels........£40 was a bit steep - but needs must.....and after the months long saga of getting Tyres, I'd had enough TBH.
Post by: Ashdowner on July 06, 2017, 07:36:54 AM
Post by: Green1 on July 06, 2017, 07:38:07 AM
I actually run a 4.00 / 18 on the rear of my 500/550's and don't have any issues. (Yet). I'm sure the more senior / experienced members on the forum will shoot me down. I run continental rb2/k112 and really like them.
M&P do good deals on a pair...
https://www.ebay.co.uk/itm/141307000267
Who told you about those James ;)
I run them on the 550 and 750
My 550 and 750 both have 4.00/18 on the rear
Post by: sgd37 on July 06, 2017, 12:05:07 PM
Cheers everyone
Post by: mike the bike on July 06, 2017, 12:34:00 PM
Post by: K2-K6 on July 06, 2017, 04:35:29 PM
The speed rating should be sufficient even if it's not that far above the max of the bike. It's tested for the tire design for a continuous / sustained speed at the rating applied. Seems to me they do this on a rig with the tire also loaded ( can't see if it's max load rating or typical average use) to make sure it doesn't fail under those conditions.
Interestingly, the tire manufacturers generally say that if the tire has been damaged, altered, underinflated or overloaded, then the speed rating would not apply, obviously! Many will not guarantee speed rating if a puncture repair has been made either as they have no way of controlling the technical aspects of the repair.
Exactly what the mot says about it someone with current knowledge would have to chip in about how or if they check speed rating against original specs.
The speed rating on its own seems to generate alot of differing views as to legality or if it's an insurance issue, in reality one of liability. There are views that say it's not stated in motoring law what speed rating should be used, only that the vehicle should not be driven above the tire's marked limit. It comes up primarily with cars when looking at winter tires as for example a tire with a V rating original fit may not be available in a pure winter / snow tire. They do fit a lower speed rating as the vehicle can be driven safely on this combination if you don't exceed the marked maximum.
There's another part of the spec that is relevant if not more important than the speed figure. It's usually placed in front of the speed designation (for example 66v) and gives a maximum loading for that tire.
This is far more absolute in terms of use as you don't reduce the weight placed on it regardless of speed driven. You can only load it upward as in adding a passenger. Overloading a tire will most likely make it fail.
Post by: sgd37 on July 06, 2017, 05:46:31 PM
https://www.oponeo.co.uk/moto-tyre-details/avon-am6-speedmaster-mkii-3-25-19-54-s-front-tt?origin=shopping&gclid=Cj0KCQjwv_fKBRCGARIsAL6R6ei6Iy2pq3cZ6lztYK4_wkWgkrWZema28h5Anbz5mFvtOd_toRbYK3UaAhzuEALw_wcB
They have a speed rating of S which I suppose is minimally sufficient. They also have a rating of 212 kg. Maybe a stupid question but does this weight include the rider or is it just the bike.
Post by: AshimotoK0 on July 06, 2017, 06:16:47 PM
Post by: hairygit on July 06, 2017, 06:31:51 PM
I want a classic look so was looking at the Avon Speedmasters.The weight rating is all up maximum load, bike, rider, passenger and luggage, you add the total of the front and rear tyre rating, and stay well within it!
https://www.oponeo.co.uk/moto-tyre-details/avon-am6-speedmaster-mkii-3-25-19-54-s-front-tt?origin=shopping&gclid=Cj0KCQjwv_fKBRCGARIsAL6R6ei6Iy2pq3cZ6lztYK4_wkWgkrWZema28h5Anbz5mFvtOd_toRbYK3UaAhzuEALw_wcB
They have a speed rating of S which I suppose is minimally sufficient. They also have a rating of 212 kg. Maybe a stupid question but does this weight include the rider or is it just the bike.
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Post by: K2-K6 on July 06, 2017, 06:42:17 PM
You have to look at how they describe the weight capacity. I've recently put some on a car and they give load capacity in Kilos at 50psi, which of course you don't ordinarily use. So you have to understand what load is available at the tire pressure you run.
I was looking at it for the car to in effect work back through from tire choice to get a start point pressure for a non standard tire. I got them to weigh the car at our local dump on their calibrated weighbridge, then added people plus payload to get a start point.
The thing about overloading a tire is it builds up temperature quickly and either the tread delaminate from the carcass as the bonding goes over temp, or the carcass fails and deflates, fast, usually.
Post by: K2-K6 on July 06, 2017, 06:49:13 PM
Post by: hairygit on July 06, 2017, 06:51:41 PM
Mine overlapped as you'd posted there hairygit, I've obviously stated the same as you. Apologies.No problem, great minds and all that!
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Post by: Green1 on July 06, 2017, 07:09:10 PM
Interestingly both my bikes have the same speed/load rating H
The rear last around 6000miles on the 750 and I often cruse along at 80/90mph non stop for an hour on my average commute
Post by: Colonial-Clive (yindi) on July 06, 2017, 07:19:32 PM
Post by: Colonial-Clive (yindi) on July 06, 2017, 07:25:45 PM
http://www.wheelhousetyres.co.uk
Post by: K2-K6 on July 06, 2017, 08:21:06 PM
Post by: Green1 on July 06, 2017, 11:33:44 PM
I just think old bikes with modern tyres looks so wrong
Post by: JamesH on July 08, 2017, 02:15:59 PM
Have been running them for years Mick - I think I told you ha ha!!!I actually run a 4.00 / 18 on the rear of my 500/550's and don't have any issues. (Yet). I'm sure the more senior / experienced members on the forum will shoot me down. I run continental rb2/k112 and really like them.
M&P do good deals on a pair...
https://www.ebay.co.uk/itm/141307000267
Who told you about those James ;)
I run them on the 550 and 750
My 550 and 750 both have 4.00/18 on the rear
Post by: K2-K6 on July 10, 2017, 02:20:21 PM
Think they fitted them as original on the Kawasaki W650 retro bike.
Post by: sgd37 on July 10, 2017, 05:59:32 PM
Cheers
Post by: sgd37 on July 10, 2017, 11:18:06 PM
http://www.ebay.co.uk/itm/325S19-ENSIGN-UNIVERSAL-MOTORCYCLE-TYRE-325-19-3-25-19-BSA-TRIUMPH-MATCHLESS-/260928465855?hash=item3cc08c6bbf:g:3cIAAOSwuLZY0p5e
They look pretty cool
Post by: florence on July 12, 2017, 01:30:02 PM
Post by: Niko on July 12, 2017, 05:44:33 PM
Could anyone identify these ones(https://uploads.tapatalk-cdn.com/20170712/a6bf43636041c584b5c296402f6eb90d.jpg)
Cheers
I like my metzler tourance(https://uploads.tapatalk-cdn.com/20170712/29795d2d9d79321ede1097fa69ec9684.jpg)
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Post by: sgd37 on July 13, 2017, 04:49:09 PM
@Niko those tyres look cool for sure but I want something a a bit more retro. However I would like to know where you got that seat.
Cheers
Post by: matthewmosse on July 13, 2017, 05:49:52 PM
I like to keep part worn sm, mk11 tyres a few years in the shed to harden them off a bit, seemed to get a few more thousand miles out of them that way, when I treated the cb500 to a new set they seemed to wear faster than old part worns, though that bike did bring out the hooligan in me, K&n filter and probably re jetted by previous owner, and very free flowing exhaust made a recipie for abusive wheelspins and sending the whole sidecar outfit sideways through corners for fun, not nice to the tyres but immense fun.
Post by: Niko on July 14, 2017, 06:00:00 PM
Yeah I think I will go with the Avon speedmaster safety mileage combo.
@Niko those tyres look cool for sure but I want something a a bit more retro. However I would like to know where you got that seat.
Cheers
eBay cheaply....
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Post by: Ian DB on July 18, 2017, 08:36:11 PM
The stock tyre size for the CB500 is 3.25 x 19 front and 3.50 x 18 rear, however some people are suggesting a 3.60 x 19 front and 4.00 x 18 rear hence I am looking at replacing both tyres with Dunlop K81 TT100’s if this is possible?
Dunlop's tyre fitment guide suggests fitting a more modern ‘Arrowmax Streetsmart’ tyre but I would rather keep with the traditional lines of a classic tyre if this is possible.
I have wrote to Dunlop and they are unable to advise re the fitment of any tyre that is not of standard size i.e. the TT 100's and therefore recommended I opt for the 'Arrowmax streetsmart'. I fully understand their stance but thought that as the TT's are their tyre some help may have been in the offing.
All help/advise much appreciated
Cheers
Post by: Bryanj on July 18, 2017, 11:46:41 PM
The 550 went to a 425/85x18 rear which will last a bit longer.
TT100's were/are in my opinion the best tyres for the 500 but as soon as the rear tyre centre tread gets to the limit of 1.6mm(I think) the tyre is illegal
Post by: jon stead on July 19, 2017, 05:06:03 AM
Post by: Trigger on July 19, 2017, 07:18:56 AM
TT 100's for the 500 are 3.60x19 front and 4.10x18 rear, you will wear out at least 2 rears for one front.
The 550 went to a 425/85x18 rear which will last a bit longer.
TT100's were/are in my opinion the best tyres for the 500 but as soon as the rear tyre centre tread gets to the limit of 1.6mm(I think) the tyre is illegal
It is only cars, van and LCV that they changed to 1.6mm, motorcycles still stands at 1mm.
Post by: flatfour on July 19, 2017, 08:51:52 AM
Post by: Ian DB on July 19, 2017, 06:37:32 PM
Post by: flatfour on July 20, 2017, 08:25:24 AM
Post by: Green1 on July 20, 2017, 08:42:36 PM
I like to keep part worn sm, mk11 tyres a few years in the shed to harden them off a bit, seemed to get a few more thousand miles out of them that way
This I don't agree with at all as tyres lose there ability to grip the road as they harden with age. The tyre on my pegaso was around 6 years old when I eventually got it back on the road. It was OK in the dry if a little vague. But when I was caught out in the rain it was just outright dangerous.
I don't recommend keeping old tyres even if they look OK
Post by: hairygit on July 20, 2017, 09:04:21 PM
It was broken down for HOW long!
I like to keep part worn sm, mk11 tyres a few years in the shed to harden them off a bit, seemed to get a few more thousand miles out of them that way
This I don't agree with at all as tyres lose there ability to grip the road as they harden with age. The tyre on my pegaso was around 6 years old when I eventually got it back on the road. It was OK in the dry if a little vague. But when I was caught out in the rain it was just outright dangerous.
I don't recommend keeping old tyres even if they look OK
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Post by: matthewmosse on July 20, 2017, 09:05:20 PM
I know what you mean about old tyres being sometimes very dodgy to ride on, my Suziki Gs125 was a 1982 bike, and when I first had it had her original bridgestone tyres, probably still with 90% of the original air, they were truly horrid in the wet but as a poor student I had to keep using them and the bike needed carefull handling being on 20 year old tyres. Drum brakes both ends were no help. I eventually saved up and bought a complete front end off a disk braked bike and grafted that on.
The seat of your pants will soon tell you if the tyre is too old to be much good even in the dry if you know that feeling, or just dig a thumb nail into the rubber, the feel tells a lot. Proper storage of tyres makes a major difference to their shelf life.
Post by: Green1 on July 20, 2017, 09:21:31 PM
It was broken down for HOW long!
I like to keep part worn sm, mk11 tyres a few years in the shed to harden them off a bit, seemed to get a few more thousand miles out of them that way
This I don't agree with at all as tyres lose there ability to grip the road as they harden with age. The tyre on my pegaso was around 6 years old when I eventually got it back on the road. It was OK in the dry if a little vague. But when I was caught out in the rain it was just outright dangerous.
I don't recommend keeping old tyres even if they look OK
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Far too long to remember. But when I'm busy I don't know were the time goes. It could be anywhere between 5or10 years ???
Post by: Green1 on July 20, 2017, 09:26:29 PM
I was running on a sidecar so had 'stabaliers' but I do find it varies according to who made the tyre, and when, some are so grip focused that for instance my dads bmw ran Conti Tour tyres, it wore the last one out in 3k miles, previously they had lasted 7k + per tyre dad complained to Continental tyres and was told the market demanded more grip, there was nothing wrong with the tyres before and 3k from a rear tyre makes a bike prohibitive to use.
I know what you mean about old tyres being sometimes very dodgy to ride on, my Suziki Gs125 was a 1982 bike, and when I first had it had her original bridgestone tyres, probably still with 90% of the original air, they were truly horrid in the wet but as a poor student I had to keep using them and the bike needed carefull handling being on 20 year old tyres. Drum brakes both ends were no help. I eventually saved up and bought a complete front end off a disk braked bike and grafted that on.
The seat of your pants will soon tell you if the tyre is too old to be much good even in the dry if you know that feeling, or just dig a thumb nail into the rubber, the feel tells a lot. Proper storage of tyres makes a major difference to their shelf life.
The super sticky tyre on my Guzzi only lasts about 2500miles on the rear and is totally crap in the rain it doesn't make a very good touring tyre
My GS125 had its original tyres on it when I bought it But I soon replaced them after running into the back of brand new Mazda RX8