rear tire size puzzle - K-Bikes.com - Excellence in Motion
 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old Sep 30th, 2010, 9:02 am Thread Starter
Senior Member
 
Ocelot's Avatar
 
Join Date: Jul 2010
Location: Newark, DE, USA
Posts: 153
rear tire size puzzle

K-philiacs

Kay is a 1990 K75C. Model verified by VIN decoder and fairing comparison. Dunlop on-line tire fitment guide recommends a 120/90/ 18 rear. Model specs at bmbikes.co.uk says 130/90 18. Even the original owners manual which came with Kay, stamped with her service dates, specifies a 130/90 18 rear. Everything I google up says 18" rear. So naturally I went ahead and ordered up a 130/90 18 rear tire.

Tires are in. Last night I get set to remove the rear wheel to tote it to the local CycleGear shop. Much to my astonishment, Kay wears a 17" rear tire!

Let me interject here that when the Bionic Freckle (the artiste formerly known as RedHead until her knee replacement) heard blue language, she wandered out and suggested: "Well, why can't you just put on the tire you have?" Gotta love them. They actually think they are being helpful.

But back to my point: WTF? Was there some kind of lowering option which included a smaller rear? Or did BMW change the size without editing the owner's manual? Or what?


Unmitigated risk aversion is the new Puritanism, complete with witch hunts, funny outfits, and solemn preachers thundering doom. The name of God is changed to Safety; the name of Satan is changed to Lawyer; but the object remains the same: to suck all the life out of life and make you live on the husk.
Ocelot is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old Sep 30th, 2010, 11:36 am
Senior Member
 
Join Date: May 2010
Location: DC, ,
Posts: 157
When did they discontinue the C model? I guess you're pretty sure its a C from the Vin verification...

http://www.verrill.com/moto/k75/k75.shtml

I don't know too much about the k75, but wasn't the 18 on the earlier bikes with the rear drum brakes? Do you have a disc in the back? I've heard of a couple other people having random rear rims on their k75.

I always check the tire on the rim just to be sure no fun!

------------------------------------------------------------------------------------
Current: 1985 K100RT Stripped.
See it here DC to Gaspe

Past: 1985 K100
See it here on my trip from DC to Panama
DC to Panama City

Last edited by lukeman; Sep 30th, 2010 at 11:42 am.
lukeman is offline  
post #3 of 6 (permalink) Old Sep 30th, 2010, 12:06 pm
PsyKotic Waterfowl
 
Join Date: Aug 2006
Location: Seattle, WA,
Posts: 1,328
As far as I know all K75Cs came from the factory with the rear drum brake and an 18" drum brake wheel. It's not unheard of for owners to swap in the disc setup with the corresponding 17" wheel. It's very easy to do.

What are the last 7 digits of your VIN?
FlyingDuck is offline  
Sponsored Links
Advertisement
 
post #4 of 6 (permalink) Old Sep 30th, 2010, 2:04 pm Thread Starter
Senior Member
 
Ocelot's Avatar
 
Join Date: Jul 2010
Location: Newark, DE, USA
Posts: 153
last seven

0132957

As I say, I ran that through the VIN decoder.

Kay has a rear disc.

Unmitigated risk aversion is the new Puritanism, complete with witch hunts, funny outfits, and solemn preachers thundering doom. The name of God is changed to Safety; the name of Satan is changed to Lawyer; but the object remains the same: to suck all the life out of life and make you live on the husk.
Ocelot is offline  
post #5 of 6 (permalink) Old Sep 30th, 2010, 10:14 pm
Enthusiast
 
Join Date: Aug 2004
Location: , ,
Posts: 296
You have what BMW called the K75/3. It got a rear disc and 3-spoke wheels. The rear disc was added so they could ABS on all K-models. It would have come with a 130/90-17 tire.

Last edited by 54089093; Oct 1st, 2010 at 10:31 pm.
54089093 is offline  
post #6 of 6 (permalink) Old Sep 30th, 2010, 11:30 pm Thread Starter
Senior Member
 
Ocelot's Avatar
 
Join Date: Jul 2010
Location: Newark, DE, USA
Posts: 153
wheels, abs

Snowflake wheels
No ABS

She must be a bastard creation from the laboratory of Doctor Frankenstein.

Unmitigated risk aversion is the new Puritanism, complete with witch hunts, funny outfits, and solemn preachers thundering doom. The name of God is changed to Safety; the name of Satan is changed to Lawyer; but the object remains the same: to suck all the life out of life and make you live on the husk.
Ocelot is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the K-Bikes.com - Excellence in Motion forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
1999 K1200RS brake pads and rotors (where do you guys generally get parts?) donnatello K1200RS/GT (Classic) 34 Nov 12th, 2009 5:17 am
Rear Tire Size kakalika K12/1300GT (Next Gen) 7 Aug 20th, 2009 12:33 pm
Tire Mileage and what affects it Stephejl Tires 13 Jun 23rd, 2009 1:15 am
Un-even rear tire wear mikay Tires 12 Jun 17th, 2008 7:46 pm
I saw something weird on my rear tire last night jaimeshawn K1200RS/GT (Classic) 2 Jan 20th, 2006 9:15 am

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome