DIR Return Create A Forum - Home
---------------------------------------------------------
690 Enduro R
HTML https://690enduro.createaforum.com
---------------------------------------------------------
*****************************************************
DIR Return to: Tires
*****************************************************
#Post#: 446--------------------------------------------------
MT21 Tire Warning
By: Rusty Shovel Date: February 26, 2014, 10:39 am
---------------------------------------------------------
Hey all,
A quick word of warning concerning the MT21 tire. It's a good
tire, but make sure you are running at least 26 PSI if you plan
to ride a freeway speeds. If you don't, this'll happen:
[img]
HTML https://lh6.googleusercontent.com/-BjDg-W7_Sic/UjmozkM6FhI/AAAAAAAAAno/qBv3kuUyr9g/w1151-h863-no/DSCN4809.JPG[/img]
See that crazy wear pattern? That's from a single trip in which
I ran the bike at 20 PSI on the freeway for about 100 miles.
More importantly, when under inflated at highway speeds, the
MT21 will cause crazy head shake. If you notice that your front
tire is shaking, pull over and check your tire pressure. I just
soldiered on and destroyed my front tire. Don't be me.
#Post#: 450--------------------------------------------------
Re: MT21 Tire Warning
By: truck11 Date: February 26, 2014, 12:33 pm
---------------------------------------------------------
good to know. Are your wheels balanced? I balanced my DRZ and
it helped so much when riding street. Just picked up some
reusable weights ready for the new bike.
#Post#: 452--------------------------------------------------
Re: MT21 Tire Warning
By: coarsegoldkid Date: February 26, 2014, 2:05 pm
---------------------------------------------------------
Yeah, low psi could be the culprit. The manual states over
20psi if I remember correctly. But I usually run 16psi on the
dirty parts as a compromise. My MT21 front did the same thing.
For some reason that single knob doesn't wear much. D606s wear
a bit smoother. However pavement screws up knobs for sure. I
also ripped bits of knobs off a MT21 rear in Death Valley. That
place has lots of rocks and I managed to get bogged down in deep
loose rocks a time or two. Riding out of them was a futile
experience. I think that's what did in the tire.
#Post#: 902--------------------------------------------------
Re: MT21 Tire Warning
By: Dogfarm Date: April 25, 2014, 8:09 pm
---------------------------------------------------------
I just got a new MT-21 and had a couple questions. What kind of
pressure are you running off road? Also, do you think their is a
need for a rimlock in front? That is have you had the need to
air them down so much you needed rimlocks?
#Post#: 904--------------------------------------------------
Re: MT21 Tire Warning
By: Rusty Shovel Date: April 25, 2014, 9:28 pm
---------------------------------------------------------
[quote author=Dogfarm link=topic=110.msg902#msg902
date=1398474568]
I just got a new MT-21 and had a couple questions. What kind of
pressure are you running off road? Also, do you think their is a
need for a rimlock in front? That is have you had the need to
air them down so much you needed rimlocks?
[/quote]
Everyone has an opinion on this one...and I'm no exception.
I've long since decided that the downsides of low tire pressure
are not worth the performance gain. I may go down as far as 20
lbs if I know I'm gonna be strictly off road. Otherwise, I stay
around 26-29 lbs. Unless you're riding less than 16 lbs, I
don't think you'll need a rim lock. Just my $.02.
#Post#: 906--------------------------------------------------
Re: MT21 Tire Warning
By: mcrider Date: April 26, 2014, 9:21 am
---------------------------------------------------------
I'm a believer in rim locks. Picked a pair of Motion Pro
yesterday. I generally run 22 front & 20 rear with slime in
both. If I pickup a thorn & get a slow leak the tire will not
slip on the rim. The wheel will need to be balanced.
#Post#: 910--------------------------------------------------
Re: MT21 Tire Warning
By: Rusty Shovel Date: April 26, 2014, 11:10 am
---------------------------------------------------------
[quote author=mcrider link=topic=110.msg906#msg906
date=1398522101]
If I pickup a thorn & get a slow leak the tire will not slip on
the rim.
[/quote]
That's a good point.
#Post#: 1333--------------------------------------------------
Re: MT21 Tire Warning
By: DaveKubler Date: July 13, 2014, 4:18 pm
---------------------------------------------------------
Everyone has their own 'logic' and what works for them re:
pressures and all that.
MY logic has always been as far as a dual sport (not a
motorcross bike)..... I run the most aggressive DOT knobbies I
can. (for the most part) and I ALWAYS keep em aired up to the
manufacture MAX psi. I get the best , most predictable wear
this way.... NEVER get pinch flats, dont need nor care about rim
locks. Yes, you may get better sand/mud traction airing way
down, but I don't like the risk/reward factor. And with this
bike, and decent skill set..... you aint getting stuck ;)
#Post#: 1353--------------------------------------------------
Re: MT21 Tire Warning
By: Rusty Shovel Date: July 15, 2014, 1:29 am
---------------------------------------------------------
Just over 3k miles on the MT21's. They're great times while
thay lasted. but the rear is toast and the front is uselessly
scalloped. I'm gonna have looking for an alternate. Dr
Blackbird suggested the MotoZ. I'll have to check that out.
#Post#: 1354--------------------------------------------------
Re: MT21 Tire Warning
By: ChipStevens Date: July 15, 2014, 9:30 am
---------------------------------------------------------
Rusty, What bike was the picture you posted from? The color of
the rim makes me think it isn't your 690. could the suspension
have something to do with the wear pattern. Haven't had the
problem on my 2013 690 running 21#. chip
*****************************************************
DIR Next Page