Author Topic: 120/100x18 tire  (Read 1184 times)

mcrider

  • Adventurer
  • ****
  • Posts: 110
  • Karma: +2/-0
  • Westfield, Texas
  • Location: Morristown, Tennessee
    • View Profile
    • Sam Houston Trails Coalition
120/100x18 tire
« on: May 16, 2014, 02:46:57 pm »
Has anyone put a 120/100x18 tire on their 690?  I want to go to Bridgestone ED77 80/100x21 & ED78 120/100x18, but the rear is 120 mm high. The MT-21 is 112 mm high. I wondering if the ED78 will hit the tank.

Comparing the tires:
Pirelli MT 21 --Stock
90/90x21  90 mm wide, 81 mm high (90 x 90%)
140/80x18 140 mm wide, 112 mm high (140 x 80%)
Bridgestone
ED77 80/100x21  80 mm wide, 80 mm high (100 x 100%)
ED78 120/100x18  120 mm wide, 120 mm high (120 x 100%)
Chris Hardy
'13 KTM 690 Enduro R
.
Donate to the Sam Houston Trails Coalition

Social Buttons


Rusty Shovel

  • Aimless Ne'er Do Well
  • Administrator
  • Grizzled Adventurer
  • *****
  • Posts: 552
  • Karma: +8/-1
  • Houston, TX
  • Location: Katy, TX
    • View Profile
Re: 120/100x18 tire
« Reply #1 on: May 16, 2014, 06:09:55 pm »
I've been wondering the same thing, but because I want the Dunlop 606 tire.  Anyone?
D==[#)
2014 KTM 690 Enduro R

SDMF_Reaps

  • Adventurer
  • ****
  • Posts: 105
  • Karma: +7/-0
  • North Eastern South Dakota
  • Location: North Eastern South Dakota
    • View Profile
    • Willow Creek Lake Weather
Re: 120/100x18 tire
« Reply #2 on: May 16, 2014, 08:10:51 pm »
I wanted a 606 also as it is my favorite on the KLR but I ended up going with a D908RR.  I probably won't put it on for a few hundred miles.  I'm going to replace the front as well with the same tire.  I'm just not fond of the stock front.

Back on subject... the 8mm difference in the tires is only around 1/3 of an inch.  I would be willing to bet it would fit just fine.  However as noted above I won't be the guinea pig lol.

Hey Rusty as a side note I finally got my thermo switch today so I'll get that write up done this or next weekend.  Depends on how much work I have to do this weekend.

Rusty Shovel

  • Aimless Ne'er Do Well
  • Administrator
  • Grizzled Adventurer
  • *****
  • Posts: 552
  • Karma: +8/-1
  • Houston, TX
  • Location: Katy, TX
    • View Profile
Re: 120/100x18 tire
« Reply #3 on: May 17, 2014, 04:21:28 am »
Yeah, I've been letting that thermo switch sit on the back burner as well.  I look forward to your write up.
D==[#)
2014 KTM 690 Enduro R

mcrider

  • Adventurer
  • ****
  • Posts: 110
  • Karma: +2/-0
  • Westfield, Texas
  • Location: Morristown, Tennessee
    • View Profile
    • Sam Houston Trails Coalition
Re: 120/100x18 tire
« Reply #4 on: May 18, 2014, 03:10:37 pm »
I may have got a hint at the answer yesterday.  Went on the Cheeseburger Run yesterday from Sam Houston National Forest to Yankee's Tavern in Carlos Texas.  Just after we started I hit a very deep rain rut, it went Kboom!  My inspection sticker plate curled under.  Need to wash the bike to inspect for tire marks.
Chris Hardy
'13 KTM 690 Enduro R
.
Donate to the Sam Houston Trails Coalition

mcrider

  • Adventurer
  • ****
  • Posts: 110
  • Karma: +2/-0
  • Westfield, Texas
  • Location: Morristown, Tennessee
    • View Profile
    • Sam Houston Trails Coalition
Re: 120/100x18 tire
« Reply #5 on: May 18, 2014, 03:46:45 pm »
I ran 606s on my '04 625 SXC.  The front always wash out on gravel.  I bet the same is true for the 690, because they have almost the same fork angle.  On my trial run with the ED77. five of us were on a very fine gravel road with a hard surface under the gravel.  All the others were having trouble in the corners;  I passed all of them having a good time.  The ED77 did great.  I was a convert!  8)
Chris Hardy
'13 KTM 690 Enduro R
.
Donate to the Sam Houston Trails Coalition

Rusty Shovel

  • Aimless Ne'er Do Well
  • Administrator
  • Grizzled Adventurer
  • *****
  • Posts: 552
  • Karma: +8/-1
  • Houston, TX
  • Location: Katy, TX
    • View Profile
Re: 120/100x18 tire
« Reply #6 on: May 18, 2014, 05:41:11 pm »
I ran 606s on my '04 625 SXC.  The front always wash out on gravel.

With my WRR, I found that an MT21 up front (for traction) and a D606 out back (for durability) was a perfect combo.
D==[#)
2014 KTM 690 Enduro R

Guymcfly

  • Guest
Re: 120/100x18 tire
« Reply #7 on: May 19, 2014, 06:37:16 am »
There is not much difference in regards to the cross section size between a 140/80x 18 and the 120/100 x18.
There are size differences between brands however. You may find a 140 in 1 brand being wider than a 140 in another.

Regards the d606, they last well but don't grip well. The front is especially notorious as a bad gripper. I tried many many tires for both longevity and grip (in both dual sport and mx application) over 30+ years of riding. The rubber also works well on some bikes and not on others...sidewall flex, distortion over objects such as rocks, roots etc, it all affects the ride.

My choice would be a Kenda 777f as a road legal front for dual sporting...given you have the dry dusty gravel terrain I have round here. Lots of rocks as well.

That being said I am now using mx tires full time on the 690 as I have not intention of using it as a dual sport. My black top never extends more than about 5 miles.

I use desert tires on the rear. Ed608 is good and tough, so is the maxis desrt. Don't like the Mich desert...tough but sketchy. The m12 is pretty good in the brief winter, spring over here. 908 is tough and not bad grip but $$$ in Oz.

I think a big thing is too keep the tires pumped above what I'd do on an mx or enduro bike...20psi or so. The mass of the 690 tends to flex the rubber more on the rim.

SDMF_Reaps

  • Adventurer
  • ****
  • Posts: 105
  • Karma: +7/-0
  • North Eastern South Dakota
  • Location: North Eastern South Dakota
    • View Profile
    • Willow Creek Lake Weather
Re: 120/100x18 tire
« Reply #8 on: May 20, 2014, 10:17:51 am »
I also really loved the K777 on the front but I tried to order one for the 690 and was told they are discontinued.

Guymcfly

  • Guest
Re: 120/100x18 tire
« Reply #9 on: May 21, 2014, 06:52:42 am »
I was told that just recently, and that they had been replaced by a new tire but I can't remember what it was.

mcrider

  • Adventurer
  • ****
  • Posts: 110
  • Karma: +2/-0
  • Westfield, Texas
  • Location: Morristown, Tennessee
    • View Profile
    • Sam Houston Trails Coalition
Re: 120/100x18 tire
« Reply #10 on: May 26, 2014, 03:50:03 pm »
Quote
I may have got a hint at the answer yesterday.  Went on the Cheeseburger Run yesterday from Sam Houston National Forest to Yankee's Tavern in Carlos Texas.  Just after we started I hit a very deep rain rut, it went Kboom!  My inspection sticker plate curled under.  Need to wash the bike to inspect for tire marks.

I just got the under tank clean & inspected it. It looks like the tire may have rubbed the tank.  It is really hard to be sure.  The MT-21 is very warn, also.

It's a wounder about!

I did not mention above the bike has the 1" Kouba Link.

Sure would like to find someone that has run the 120/100 tire.  I think the Bridgestone are the best all around tire for dual sporting.
Chris Hardy
'13 KTM 690 Enduro R
.
Donate to the Sam Houston Trails Coalition

truck11

  • Adventurer
  • ****
  • Posts: 209
  • Karma: +2/-0
  • Sterling, VA (Northern VA - DC Metro)
  • Location: Sterling VA
    • View Profile
Re: 120/100x18 tire
« Reply #11 on: July 08, 2014, 09:19:38 pm »
Bringing this topic back up.. need quick help as I am trying to plan a quick trail ride back down at Hatfield McCoy on July 19th weekend.......
MT21 stock is 140/80-18 and worn too much for any dirt riding.  I have a brand new Kenda Trakmaster II from my old bike that never got installed - but it's 120/100.
What has been the consensus about the 120/100-18 tire fitting on the 690?   
2014 690 Enduro R


mcrider

  • Adventurer
  • ****
  • Posts: 110
  • Karma: +2/-0
  • Westfield, Texas
  • Location: Morristown, Tennessee
    • View Profile
    • Sam Houston Trails Coalition
Re: 120/100x18 tire
« Reply #12 on: July 09, 2014, 11:17:31 am »
I ran the ED78 120/100x18 in Idaho weekend before last.  It does not appear to have hit, but we were not on rough roads.  It rained just before we got back, so any marke may have been wiped out.

So far, so good.
Chris Hardy
'13 KTM 690 Enduro R
.
Donate to the Sam Houston Trails Coalition

DaveKubler

  • Guest
Re: 120/100x18 tire
« Reply #13 on: July 13, 2014, 04:13:03 pm »
Best tire combo IMO, and many others for dual sports are the Pirelli MT-21 front and the Dunlop D606 rear.  The 606 on the front can wash out, but the wear of the MT-21 rear is horrible and the 606 does much better on the rear....nice bite and better mileage.   I have the D606 on the way for me to put on down in New Mexico after I assume I will have almost no tire left after 1500 miles on the OEM MT-21.   I have heard NUMEROUS accounts of guys running the 130/90 18 D606 on the KTM 690 with no issues.  10 mm higher (1 centimeter) shouldn't hit anything.  It is also 'slightly' narrower by the 10 mm so theoretically it will dive into turns quicker/easier.  (miniscule)

truck11

  • Adventurer
  • ****
  • Posts: 209
  • Karma: +2/-0
  • Sterling, VA (Northern VA - DC Metro)
  • Location: Sterling VA
    • View Profile
Re: 120/100x18 tire
« Reply #14 on: August 11, 2014, 08:58:30 pm »
For those who like pictures....
Left - 120/100 - Kenda Trak Master II - DOT tire  (I loved this tire on prior DRZ400)
Center is the stock 140/80 Pirelli MT-21 DOT tire (850-900 miles)
Right is Michelin M12  140/80 (stock size)   NOT DOT  Do not plan on riding this on the road - it's super slippery.  My plan is to re-install the worn MT-21 after the trails next weekend.  Plenty of tread for road use.
 
Unmounted


Here is the MT-21 Stock tire still mounted.   You can really see the height difference in sizes but also different manufacturers



ANGRY tire - Ready for some trails this weekend.



2014 690 Enduro R