BMW K bikes (Bricks)

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1Back to top Go down   Plus 1 tires Empty Plus 1 tires Thu May 16, 2013 8:08 pm

Alheng

Alheng
Platinum member
Platinum member
Can anyone confirm for me that a 140/80/17 rear will fit a standard K100RT?

    

2Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Thu May 16, 2013 8:44 pm

RicK G

RicK G
admin
admin
Yep they do the job just fine.


__________________________________________________
"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
    

3Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Thu May 16, 2013 10:09 pm

andyb

andyb
Gold member
Gold member
I believe they must be a matching tyre set front and rear if you do the +1 oversize - eg Pirelli Sport Demons.


__________________________________________________
AndyB
'03 K1200GT,

'88 K100 RT
Chassis number: 0097248 ; Vehicle code: 0504; Series: K589
Model: K100RT 84 (0504 (0505) Body Type: K100RT 84 (0504)
Catalog Model: ECE; Engine: (0504); Production: 1988/9
Plus 1 tires 13763011
    

4Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Thu May 16, 2013 11:08 pm

Basic2

Basic2
Platinum member
Platinum member
Fitted 110/80 - 18 & 140/80 - 17 Sport Demons to my 11/87 Basic last weekend.
Looking forward to trying them out now.



Last edited by Basic2 on Fri May 17, 2013 12:30 am; edited 1 time in total


__________________________________________________
K100 Basic 2
11/1987 6308319K100CJ
Marakesh Red
    

5Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Thu May 16, 2013 11:29 pm

RicK G

RicK G
admin
admin
@andyb wrote:I believe they must be a matching tyre set front and rear if you do the +1 oversize - eg Pirelli Sport Demons.
Don't have to be matching but some tyres do work well with a match. I used to run a Bridgestone BT045 on the front and a Michilin Macadam in the recommended sizes and it was a good combo. I do recall TWB saying that he liked the sport demon on both ends and felt it worked better than having a combo.
If you have a problem with a combo the manufacturer will always blame the other brand.


__________________________________________________
"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   Plus 1 tires Empty Re: Plus 1 tires Fri May 17, 2013 1:46 am

Two Wheels Better

Two Wheels Better
Moderator
Moderator
A Japanese tyre engineer is drinking warm saki along with his Italian, American, English and German tyre engineer mates, who're drinking red wine, steins of strong beer, Pepsi, and gin & tonic, respectively. They're slurring and laughing whilst discussing, through sign language and sketches on serviettes (napkins), tyre design, rubber compounds, traction, silica content, adhesion limits, wear characteristics and marketing. The night ends in a blur.

The next week at their respective factories they're attempting to recall the methods each one drunkenly mentioned as to why their particular tyre design is superior, but neither can remember exactly what was said. In the end they give up and design their front tyre to go with their back tyre, as intended.

The moral of the story is: One brand of tyre wasn't intentionally designed to be fitted to the same bike and to follow another brand of tyre through a bend or down a long stretch of highway, although you might get lucky now and again.

...or, drink what the other is drinking if you want to know what he is thinking.


__________________________________________________

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.

~We all believe what we want to believe in - Rob Dickinson
    

7Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Fri May 17, 2013 2:59 am

andyb

andyb
Gold member
Gold member
+1 Daz.................................. I'm sure I read it in the operators manual. We could use some warm saki down here, the grey weather is setting in.


__________________________________________________
AndyB
'03 K1200GT,

'88 K100 RT
Chassis number: 0097248 ; Vehicle code: 0504; Series: K589
Model: K100RT 84 (0504 (0505) Body Type: K100RT 84 (0504)
Catalog Model: ECE; Engine: (0504); Production: 1988/9
Plus 1 tires 13763011
    

8Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Fri May 17, 2013 12:24 pm

Alheng

Alheng
Platinum member
Platinum member
Must admit that I am very dissappointed with the tire choices available on the shelves here in Perth, went to 4 shops and they had either BT045s, Marathons and/or the Lasertecs. I originally wanted to put on a pair of Sport Demons but no one had them, ended up with old school Metzeler Lasertecs, in +1 sizes. Changed both front and back. Even though the original front Macadams had pleanty of thread, the original tires was pretty old. Rode 50+km to scrub them and so far they seem pretty decent. The new tires allow me lean much lower then I was comfortable, with the old tires.

What pressure do you all recommend I should run?

    

9Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Fri May 17, 2013 3:15 pm

10-ring

10-ring
Silver member
Silver member
I just got the sport demons 140/80-17 and 110/80-18 installed the back tire 2 weeks ago feels great will try to do the front tire this week . Got them from Motorcycle super store around 230$ for the set Plus 1 tires 212902

    

10Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 12:15 pm

AJ.Valente

AJ.Valente
Life time member
Life time member
I'm a bit confused. The manual says 130/90-V17, but the sticker on my bike says 120/90-H18 (sic). Not sure what year the manual is, or for that matter what year the sticker is either.

I'm running a Bridgestone Spitfire 130/90-H18, and after about 800 miles it runs very quiet and feels very tight in the curves.

I assume a 140 width will work since others have tried it, but what about tire height? People have spec'd /80, but BMW is recommending /90.

So, the full question is; will a 140/90-17 (H or V rated) do the job?

    

11Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 12:49 pm

Alheng

Alheng
Platinum member
Platinum member
My bike is a 1985 K100RT and the sticker shows 100/90/18 front and 130/90/17 rear. Looks like different markets and years might have different sizes.

    

12Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 2:27 pm

Two Wheels Better

Two Wheels Better
Moderator
Moderator
Did you look at the rear wheel's tyre size? If it's an 18" wheel it's got a drum brake, ala K75.
A 140/90 series wouldn't be available, nor would it be wise due to being too tall. 140mm tyres with an 80 profile are acceptable where a 130/90 is specified. We assume this is a K with a 17" rear wheel and disc brake.


__________________________________________________

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.

~We all believe what we want to believe in - Rob Dickinson
    

13Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 9:10 pm

AL-58

AL-58
Life time member
Life time member
@AJ.Valente wrote:I'm a bit confused. The manual says 130/90-V17, but the sticker on my bike says 120/90-H18 (sic).

I'm running a Bridgestone Spitfire 130/90-H18,

So, the full question is; will a 140/90-17 (H or V rated) do the job?
So your sticker says to fit an 18" tyre and you have an 18" Spitfire fitted. It is impossible for a 17" tyre(eg 140/90-17) to fit an 18" rim to begin with.
Your bike is an '85 K100RT (from your profile).
Standard would be F 100/90-18 and R 130/90-17.
+1 sizes would be F 110/80-18 and R 140/80-17.
If you do have an 18" rear wheel/tyre it is from a K75 and would have a drum brake.
Has someone fitted a K75 rear end at some stage? If you have an 18" rear and the standard tyre is 120/90, your 130/90 is already a plus 1 size.
If your wheel is a 17 but the sticker says 18, maybe the rear panel with the sticker has been changed at some stage and its just the wrong sticker for your bike (K75/100 use the same rear bodywork)

Al


__________________________________________________
'87 K100RS/HRD sidecar (1100 motor)  sc25 
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Plus 1 tires K-dogs10
    

14Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 9:26 pm

RicK G

RicK G
admin
admin
+1 to what AL said and is the bike an ex police because that would explain the different tail section with the wrong sticker.
An 80% profile on a 140 is almost the same as a 90% profile on a 130 so the tyre diameter is the same or close and will only lead to less than 1% speedo error.


__________________________________________________
"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
    

15Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 9:31 pm

charlie99

charlie99
VIP
VIP
could the rear be off a later series bike ....k1 or 16 valve something ? my wide one is 18 inch


__________________________________________________
cheezy grin whilst riding, kinda bloke ....oh the joy !!!! ...... ( brick aviator )

'86 K100 RT..#0090401 ..."Gerty" ( Gertrude Von Clickandshift ) --------O%OPlus 1 tires Au-log10

'86 k100 rs.. #######..  "Fred " (f(rame) red ) ( Fredrick leichtundschnell ) - -
bits and pieces from many kind friends across the k100 world ...with many thanks ..
    

16Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sat May 18, 2013 10:16 pm

AL-58

AL-58
Life time member
Life time member
@charlie99 wrote:could the rear be off a later series bike ....k1 or 16 valve something ? my wide one is 18 inch
k1/16v/1100RS are wide 3 spokes wheels to take a 160/60-18
K75 is a narrow 8 spoke(4 Ys) to take a 120/90-18
A very big difference.
Al


__________________________________________________
'87 K100RS/HRD sidecar (1100 motor)  sc25 
'92 K100RS-16v (Paint it Black)

'87 K100RT with Paralever backend

"When I'm too old and too foolish to handle a sidecar I'll buy a Sportsbike"

Plus 1 tires K-dogs10
    

17Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sun May 19, 2013 1:42 pm

AJ.Valente

AJ.Valente
Life time member
Life time member
@charlie99 wrote:could the rear be off a later series bike ....k1 or 16 valve something ? my wide one is 18 inch

No, just a typo. It's a 17" tire, sorry bout that.

    

18Back to top Go down   Plus 1 tires Empty Re: Plus 1 tires Sun May 19, 2013 9:39 pm

RicK G

RicK G
admin
admin
But you got some heads whirring hey Very Happy


__________________________________________________
"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
    

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