Wider, more agressive, knobby tires for K75

[JoHo]

Hey guys.

I am slowly starting my K75 Scrambler project, but I need your guys expertise.

I want to get some agressive looking wider tires on my 1987 K75 C to give it more of scrambler look.

A bit of info before you answer
- I will never drive offroad on my bike
- Its not a means of transportation for me, its an expensive hobby, so it will (hopefully) never see rain, or snow or anything like that
- The plan is to cruise around it in the city, or maybe some longer rides around my very small country if the weather is good. No twisties, no reckless driving

My question is:
- How wide can I go? 130/140 on the back? I have the Y spoke ( I guess) rims
- Have anyone had experience with refitting wider tires on standard rims?
- Do I need to get radial or ply-bias tires/ tubeless or what?(I have no idea what is what)/ what is the pros and cons?

I have been looking at
Heidenau K60 Scout tires
Shinko 705
And some other once I can't seem to remember now.

Your help is very much apreciated.

[The Mighty Gryphon]

How about something a bit more in keeping with the urban assault vehicle concept?

[Laitch]

How about something a bit more in keeping with the urban assault vehicle concept?

:laughing-on-ground:
Here's a less costly alternative.

Poser chains.jpg (31.44 kB . 239x250 - viewed 1042 times)

[RobP]

When I first got my K100RS the PO had installed a Shinko TrailMaster tire on the back.  Probably not a lot wider, but definitely knobby.   I have since replaced front and rear with Shinko 712s.

[JoHo]

Thanks Rob. I'll be sure to check those out.
How did you like Them?



Laitch and Gryphon - why?
I could use the help, not the trolling..

[JR67]

I copied this from this forum:

>>>>Clearance is not the only thing to consider.  Proper rim width is also important.  IIRC, the 130/90 tire size is right at the maximum recommended tire width for the stock 2.75 inch rear wheel.  A 140/80 may clear the hard parts but its bead may not sit properly on the rim and the sidewalls will be distorted inward as well.  Any advantage gained with the wider tire will be lost with the extra roundness of the contour caused by mounting it on the same ol' rim.  Just my $0.02<<<<

If you go to the Bridgestone site you'll find that they list recommended rim/tire sizes but also minimum and maximums. Tire to hardware clearance is of course another thing to check.
I have personally tried oversize tires on my Guzzi and will not recommend it, I lost confidence and feel while leaned over and could not use the tire to the edge, as showed in the width of the 'chicken strips' :)

[Laitch]

Any advantage gained with the wider tire will be lost with the extra roundness of the contour caused by mounting it on the same ol' rim. 

JoHo is not interested in advantage; he's interested in appearance.  :hehehe

[RobP]

I like the Shinko 712 tires a lot.   

[Laitch]

- why?
I could use the help, not the trolling..

It's a chronic condtion. Try to have some sympathy.
If you want high-quality tires that are aggressive enough to produce envy in onlookers and invitations to copulation opportunities everywhere you go, you should get the Heidenau Scout 60—130/80 for the rear, 110/80 for the front. The front will need a tube; the rear will be tubeless. They will lower the bike by a few millimeters. The rear is stock width; the front is 10mm wider. That shouldn't be a problem. They will not perform as well on wet pavement as high-quality road tires but, as I understand it, you and you bike are intended to be slightly oversize, rolling objets d'art so they should be ok.