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TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: SDCR john on August 01, 2019, 05:30:58 PM

Title: Radial Tires on a 94 K75 S
Post by: SDCR john on August 01, 2019, 05:30:58 PM
Fellow Brick riders,

  I hope that this is the right spot to post a tire info thread, if not, I apologize in advance.

  I got my 94 K75 S this Spring, and it has Metzeler bias ply tires mounted. The front is almost done, and I have about 50% tread left on the rear. I am ready to have new tires mounted.

   So my question is, can I mount a set of modern, sport touring radials, and should I try to find tires with a size that is the exact match to my bias ply size, or is there different size that is preferred?

 The current tires are: Front: Metzler Lasertec  100/90-18. Rear is Metzler Lasertec  130/90-17.

My goal, is for comfortable ride  quality, good handling and perhaps higher mileage life.

Any recommendations, advice or tips  is very much appreciated. Thanks.

Title: Re: Radial Tires on a 94 K75 S
Post by: Scott on August 01, 2019, 07:07:28 PM
I'm very happy with my Avon Roadriders, they are the right type tire and size for these motos and reasonably priced.  Might be worth a look, I've always found the Metzlers to be a bit twitchy.  I suppose it's subjective, but I've owned many motorcycles and am really and happy with these.  Another tire i liked on my r100r was a Pilot Active, I think by Michelin.  Happy searching, chunk.
Title: Re: Radial Tires on a 94 K75 S
Post by: SDCR john on August 01, 2019, 08:58:15 PM
Scott,

Thanks for the tip. I looked online, but could not find the 100x90-18 front size. Did you buy yours recently?

I'm very happy with my Avon Roadriders, they are the right type tire and size for these motos and reasonably priced.  Might be worth a look, I've always found the Metzlers to be a bit twitchy.  I suppose it's subjective, but I've owned many motorcycles and am really and happy with these.  Another tire i liked on my r100r was a Pilot Active, I think by Michelin.  Happy searching, chunk.
Title: Re: Radial Tires on a 94 K75 S
Post by: Scott on August 01, 2019, 09:37:42 PM
Yea, not too long ago, I might have bought the set here or bike bandit.  I'll look for a receipt and post if i find more.  scott.
https://www.jpcycles.com/product/210-171/avon-am26-roadrider-100-90-18-front-rear-tire?mrkgadid=3300286578&rkg_id=0&utm_source=google&utm_medium=cpc&utm_campaign=Google+Shopping++Manufacturer+Intent+-+Tires&product_id=210-171&utm_content=pla&adpos=1o1&creative=278823731742&device=c&matchtype=&network=g&gclid=CjwKCAjwm4rqBRBUEiwAwaWjjKlowkFduX41EHJeipExc3rlYVYTkTPABGq4Dqm1bY2GZ_9AP0AzzhoCIA4QAvD_BwE
edit to add:  I found the receipt, i got them from Bike Bandit.  see attached.

* IMG_20190801_184453123.jpg (44.39 kB . 768x432 - viewed 193 times)
Title: Re: Radial Tires on a 94 K75 S
Post by: BlitzenGruv on August 01, 2019, 10:38:31 PM
I use Roadriders on all my British bikes, but they are not radials. Also, they are not made with a specific front or rear tire, just pay attention to the direction arrows when mounting.
I use 100/90x18 on the rear. I think I got my last set from Iron Pony, but they should be available from many different vendors.
I use Metzeler Roadtec on the K, but it's a much heavier machine.
Title: Re: Radial Tires on a 94 K75 S
Post by: SDCR john on August 02, 2019, 06:05:33 PM
thanks for the info. I am sure that Roadriders are good tires, but I would like to try modern radials. So, still looking for any i do on using radial tires on the k75S, that would be appreciated.
I use Roadriders on all my British bikes, but they are not radials. Also, they are not made with a specific front or rear tire, just pay attention to the direction arrows when mounting.
I use 100/90x18 on the rear. I think I got my last set from Iron Pony, but they should be available from many different vendors.
I use Metzeler Roadtec on the K, but it's a much heavier machine.
Title: Re: Radial Tires on a 94 K75 S
Post by: andrej_gr on August 02, 2019, 09:40:03 PM
Did a little research last year specifically looking for radials for my K75. Not too many options at suitable dimensions. Ended up with Pirelli Diablo Rosso 2 140/70/17 on the back and Pirelli Angel GT 110/80/18 on the front. Have done a couple thousand km, so far so good.
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Title: Re: Radial Tires on a 94 K75 S
Post by: K1300S on August 02, 2019, 10:12:44 PM
huge thread on this topic.  one of the many...
http://www.motobrick.com/index.php/topic,2927.msg111912.html#msg111912

no real advantage to radials for these bikes.  the modern bias tires are every bit as good.   i run michelin pilot activ's on both my K75S's.  love them.  they are used for track duty, around town and trips.  zero issues and lots of grip (including on track).
Title: Re: Radial Tires on a 94 K75 S
Post by: SDCR john on August 04, 2019, 08:33:03 AM
Mlytle,

Thanks for the link and the tip on the Michelin Pilots. I am beginning to think that staying with bias ply tires is my best route, as I can get a correct size match for the front and back.
Title: Re: Radial Tires on a 94 K75 S
Post by: caveman on August 05, 2019, 05:02:43 AM
I'm also running Avon Roadraiders and like them very much. Normally I run the rear for 6  to 7,000 mile and change the front ever other rear. Took a trip this spring and stretched them out to 9,400 miles and still had a bit of tread left on them. I like them because they give good grip on wet roads compared to other tires I have tried. I don't care for lazertecs at all.
Title: Re: Radial Tires on a 94 K75 S
Post by: billday on August 05, 2019, 08:10:00 AM
Early in my motobricking career I wasted a fair amount of money on Metzelers that started cracking the minute they were mounted.

Now I swear by Shinkos. Great value, and they seem to have a thing for making tires that fit old motos.
Title: Re: Radial Tires on a 94 K75 S
Post by: The Mighty Gryphon on August 05, 2019, 08:29:32 AM
Early in my motobricking career I wasted a fair amount of money on Metzelers that started cracking the minute they were mounted.

Now I swear by Shinkos. Great value, and they seem to have a thing for making tires that fit old motos.

+1  I am torn between the Shinko and Bridgestone.  The Eurotires don't seem to offer the value, mileage, grip, and price vs. the Oriental brands.