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1Back to top Go down   Tyres again! Empty Tyres again! on Mon Aug 31, 2015 8:18 am

indian036

indian036
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While I'd like to put radials on my '85 K100RT, it seems that the Avon Azaro AV46 rear is no longer available, or if one could be found it may be long in the tooth before it's even put on. 

No problem with the BT45s on it, but some are very happy with Pirelli Sport Demons, so I'd like to try them for a change and comparison. 
Anyone tried both and can comment?

Currently, they are at a good price at BikeBiz in Parramatta, though the 100/90 front is only 56H while the 110/80 are 58V, for a theoretical 2mm smaller radius. 

Any thoughts on whether the 58V is a worthwhile benefit over the factory spec size with 58H?

These will be the first bike tyres I've bought since 1973, when an Avon rear replaced the factory Yokohama on my CB175 and was worth +10mph on any given corner!

Thanks,

Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Newest toy, slightly non-original
    

2Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 8:32 am

Stan

Stan
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I have Bridgestones on my basic and Sport Demons on my RT. I would take the SDs over the the Bridgestones every time.


__________________________________________________
1983 K100 basic vin 0003960 colour red  GONE
1987 K100RT vin 0094685 colour, orange peel, sorry, pearl..GONE
F800R black
    

3Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 9:05 am

92KK 84WW Olaf

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Bill travelled on my RT on BT45s back in March.....it got a new rear tyre after his travels and which has since worn out! So both front and rear are being replaced. Not due to poor performance, just lots and lots of miles. My dilemma also is which to go for.

I have also had the same debate on tyres, including a long one on Saturday with someone who has run both the SD and BT45 on the same bike. He was very happy with both but gave his mark to the BT45 which he felt gave less miles but that opinion was based on our weather conditions. Key is really how much you use the bike and if you use in very poor weather conditions, the cold and wet in winter or is it parked up for winter. His experience was the BT for the colder wet winter, that was after trying both. I have the BT45 on all the time and absolutely love the feeling of confidence on them in the winter BUT I have not tried the Sport Demons on the bike so I can't compare.

Going back to 1973, I remember the Yokohama, yes they were terrible. The only Avon back then I think was the Roadrunner which I used all the time while the purists insisted on the TT100. If you ride on a Yokohama you could ride on anything.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

4Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 9:07 am

Holister

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@indian036 wrote:....
Currently, they are at a good price at BikeBiz in Parramatta, though the 100/90 front is only 56H while the 110/80 are 58V, for a theoretical 2mm smaller radius. 

Any thoughts on whether the 58V is a worthwhile benefit over the factory spec size with 58H?
.....
There's not a lot of difference between those load and speed ratings so just go with the size you're happy with. The standard for the front is 110/80

56 = 224kg
58 = 236kg

H = >210kph
V = >240kph


__________________________________________________

1989 K100RT     VIN  0097367 (naked)  
1996 K1100RS   VIN  0451808
  Tyres again! Austra12    Fuel:  95 Octane
Engine Oil: Nulon Full Synthetic 15W50
Gear Box Oil:  Nulon Synthetic 75W90
    

5Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 10:15 am

RicK G

RicK G
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Sports Demons have a very good following with the guys up here. I put the guys on the Z1300 forum onto them and they are raving about them.
I also fitted Marg's K75 with them and she said how much better the bike felt in the corners.
Yokohama was bought by Shinko.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


Bikes 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki
    

6Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 10:46 am

92KK 84WW Olaf

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You wont often take a K100 over the 200kmh, gearing puts the top speed at red line just about 210kph so you wont be using the extra ability of a V rating over the H rating.

I struggle with the weight calculations though. I think we regularly exceed the maximum weights, at least those of us into longer trips 2 up and all the gear. When you look at a permitted 10kg in each pannier, 5 kg in a top box, plus a pillion and rider in bike gear the 200kg in the book is very tight.

For curiosity weigh yourself in full bike gear, my own comparatively light 75kg rapidly became 90kg without winter linings yet most of the K owners are well over 75kg [anyone taking offence can claim their free pint of Guinness at my local pub], so rider and pillion are easily 175kg kitted out. Add the 25kg gear plus a tank bag, underseat and fairing storage plus the fact that I bet everyone exceeds the weights you are easily looking at maybe 225kg upwards........The all up weight for the K100LT, no matter what way it's distributed puts one axle outside even the 58 rating loading. Given the modest top speed it shouldn't be an issue but I suspect that's what leads us to running tyre pressures at the upper levels.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

7Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 12:59 pm

Dai

Dai
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@92KK 84WW Olaf wrote:Going back to 1973, I remember the Yokohama, yes they were terrible.
We used to call them 'Yokoteflons'.


__________________________________________________
1983 K100 upgraded to K100RS spec, 1987 K100RT
Others...
1978 Moto Guzzi 850-T3, 1979 Moto Guzzi 850-T3 California,1993 Moto Guzzi 1100ie California
2020 Royal Enfield Bullet 500
    

8Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 6:03 pm

Brad-Man

Brad-Man
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Hi All:

I'm not sure if this has been pointed out before or not, but if the same manufacturer of a tyre/tire has both a "V" and and "H" rated tire in a size, the V-rated tyre/tire will have a slightly softer compound and will not last as long, but WILL have a bit more grip in almost all situations.

Food for thought...


__________________________________________________
Toys don't make the man - Man makes the toys....
Tyres again! Usa-lo10
    

9Back to top Go down   Tyres again! Empty Re: Tyres again! on Mon Aug 31, 2015 8:35 pm

indian036

indian036
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Thanks for the input, guys. 

Looks like the SDs will get a go. Having more dry days than our Irish friends, I tend to avoid wet riding where there is a choice, but deal with it if it comes along. 

I might go for the 110/80 front, just for matching the 58V of the back. Also, when I put the shorter rear shock on, I couldn't move the forks up the same amount because of the handlebars, so the 2mm smaller radius will even it up just a bit. 

Olaf, I'll take offence at your (accurate) weight comment, just for the excuse to visit you again and to see your particular neck of the Irish woods. Tyres again! 905546712 Hopefully next year. In the meantime, enjoy the company of my Oz mates this year. Both Rosskko and Gaz are worth meeting. 

Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Newest toy, slightly non-original
    

10Back to top Go down   Tyres again! Empty Re: Tyres again! on Tue Sep 01, 2015 5:02 pm

92KK 84WW Olaf

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Bill

You will I have to join the queue. Seems the weight comment has so far upset about 2,000 members.....

If Gaz and Rossko are over before you they can both bring yours back.....


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

11Back to top Go down   Tyres again! Empty Re: Tyres again! on Tue Sep 01, 2015 8:49 pm

indian036

indian036
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@92KK 84WW Olaf wrote:Bill

You will I have to join the queue. Seems the weight comment has so far upset about 2,000 members.....

If Gaz and Rossko are over before you they can both bring yours back.....
Gaz and/or Rosskko bringing it back would defeat the purpose.  Very Happy

It seems you are going to have an expensive time! What do 2000 Guinnesses cost? affraid


Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Newest toy, slightly non-original
    

12Back to top Go down   Tyres again! Empty Re: Tyres again! on Tue Sep 01, 2015 9:10 pm

92KK 84WW Olaf

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Have to think on the price of Guinness, about €4 or €5 for a pint I think.....

Guess you will be back later next year.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

13Back to top Go down   Tyres again! Empty Re: Tyres again! on Tue Sep 01, 2015 10:04 pm

indian036

indian036
Life time member
Life time member
@92KK 84WW Olaf wrote:Have to think on the price of Guinness, about €4 or €5 for a pint I think.....

Guess you will be back later next year.
€9000!  Ouch. Less a bit for those like Jacko - "I'll have a half."


June or early July if all goes well.Very Happy




Bill


__________________________________________________
1985 K100RT  VIN 0028991  My original Very Happy   (Historic rego)
1985 K100RT  VIN 0029036  BOB the Blue Old Bike  (Historic rego)
1990 K100LT  VIN 0190452  Work in progress
1984 K100RT  VIN 0023022  Work needing lots of progress

1986 K100RT  VIN 0090542  Work needing lots and lots of progress
1993 K1100LT  VIN 0183046  Work in progress
1993 K75S  VIN 0213045  Newest toy, slightly non-original
    

14Back to top Go down   Tyres again! Empty Re: Tyres again! on Wed Sep 02, 2015 5:04 am

92KK 84WW Olaf

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That sounds excellent. Can help with my birthday......might be a camping trip on!!


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

15Back to top Go down   Tyres again! Empty Re: Tyres again! on Wed Sep 02, 2015 9:16 am

88

88
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I suspect you are right about us having to pump them up due to pressure on the limits. I'm 105kg out of the shower so with gear boots etc and fully packed panniers I must be pushing 3/4 on the 200 kg limit! 

@Indian036. I've always gone for the H rated Pirelli SD's and I have the 110/80 out front (almost 9000miles /14000km) out of the current one. Get the tallest one available for the back as the original size is not one they do! Mines a a 140/70 but I would prefer a higher profile.


__________________________________________________
Tyres again! Ir-log11 88....May contain nuts!Tyres again! Ir-log11

"The world is a book and those who do not travel read only one page." - St. Augustine from 1600 years ago & still true!

Bike: K100LT 1988. 0172363. AKA the Bullion Brick! Mods: k1100 screen and stands.
K1: 1990. 6374189. Custom Stealth Black paint.
    

16Back to top Go down   Tyres again! Empty Re: Tyres again! on Wed Sep 02, 2015 11:54 am

92KK 84WW Olaf

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I was trying to work out the pressures in that sometimes higher pressures can be compensating for other problems.

Take 105kg, add 15kg for bike gear which is what I found, now you have 120kg minimum, then add for a few office items and you are at 15ok, pretty much the level the manual will call for two up riding and two up tyre pressures.

No reflection on the bike or anything, just the same issue airlines had with their average passenger weights being incorrect and causing stall/overweight incidents. I suspect that the solo riding pressures being published are simply too low for a K as they are average situations that don't take account of us being on the upper limits.

I have always started out with recommended pressures but then adjust until I find what feels right and its always harder. Even with known good suspension etc. I don't like the way the K behaves if tyre pressures are low, definitely impacts on confidence.

On profiles am I right in thinking few manufacturers are now offering 140/80 rears? I took some measurements on mine [monolever rear] and seems a 150 will just about fit.


__________________________________________________
1992 K100LT 0193214 Bertha Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red 578 bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 689 58,645 now 106,950 miles Deceased.
1983 K100RS 0011171 Fricka 606 Alaska Blue 29,495 miles Damn K Pox Its a Bat outta Hell Now 37,190 miles
1996 K1100LT 0233004 Lohengrin Mystic Red 38,000 miles.
    

17Back to top Go down   Tyres again! Empty Re: Tyres again! on Wed Sep 02, 2015 12:16 pm

Two Wheels Better

Two Wheels Better
Moderator
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Pirelli do offer a Sport Demon in 140/80VB17 which fits Monolever swingarms and the Y spoke wheel with no clearance issues. A 150/70 will fit but is too wide (by the specs - I realise people fit them to their bike) for the Y spoke and the profile ends up too sharp, adding to nothing in terms of handling, but one does get 'The Look' over the skinny 130/90.


__________________________________________________

“Some people see things that are and ask, ‘Why?’. Some people dream of things that never were and ask, ‘Why not?’. Some people have to go to work...

~George Carlin

1970 R60/5, OZ '77 R75/7-R100, '85 K100'87 K75C, OZ '87 K100RS, '93 K11-K12 Big Block, '93 K1100RS, '95 R100-Mystic, '96 K1100RS, '98 K1200RS, '00 K1200RS, '02 K1200RS, '03 K1200GT, '04 R1150R'04 R1150RT, '05 K1200S, '06 K1200R, '07 K1200R, '09 K1300GT & 2013 R1200RT-Polizei  - Beemers owned still or sold.

    

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