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#143441 - 11/03/18 04:40 PM Re: Front tire pressure with no rim lock [Re: FlipOne]
Muniac Offline


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Registered: 01/16/04
Posts: 5848
Loc: Montrose, CO
Nothing terribly wrong with riding large and loving life. laugh Be safe out there.
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#143770 - 12/12/18 06:31 PM Re: Front tire pressure with no rim lock [Re: FlipOne]
InsaneDiego Offline
Junior Member

Registered: 05/06/17
Posts: 37
Loc: San Diego CA
I rarely drop below 18 psi front unless riding lots of sandy washes (which happens frequently in CA's Anza Borrego desert). However, in many cases, the trails can go from sandy wash to hardpack w/rocks then back to sand again. So I opt for more vs less psi in that case.

Muniac - you mentioned Heavy Duty (HD) tubes - what brand/thickness do you use? I've heard STI Ultra HD tubes (4mm) are quite sturdy, other HD tubes seem to be 2.5mm - 3mm. I'm about to replace a rear tire and might as well get a good tube.

Others please chime in w/your tube choice + experience.

Regards
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#144339 - 02/11/19 07:11 PM Re: Front tire pressure with no rim lock [Re: FlipOne]
Paul49 Offline
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Registered: 07/22/11
Posts: 1768
Loc: High Peak, UK
I've used Michelin H/D tubes, just hard work fitting them.
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#144344 - 02/12/19 03:43 PM Re: Front tire pressure with no rim lock [Re: FlipOne]
Muniac Offline


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Registered: 01/16/04
Posts: 5848
Loc: Montrose, CO
InsaneDiego - Sorry I missed your post and a bit late with a response. I have always used generic HD motocross tubes in both tires. I run 15 PSI front and 10-12 PSI rear for all off road riding. In the rocks and hard terrain I'm not aggressive with hard hitting riding. So pinch flats are very rare. Cactus tines were a much bigger problem when I was riding in AZ.

As for the rubber thickness on tubes, I've not measured it. I can tell out of the box they are heavy rubber. Good enough for my riding. I always check for leaks before installing HD tubes. I had several leak where the valve stem enters the tube. Sometimes the pinch bolt on the valve stem is loose too. I've had valve cores leak and/or be loose. Yes, on brand new tubes. As for brand, I will always buy a recognized name and select a premium grade. The few extra bucks you'll pay avoids problems I think by getting you better quality.

The HD tubes are more difficult to tuck into the tire. I will install tubes first by poking the valve stem through the rim. Then I'll work the tire over the tube there. Tuck the balance of the tube into the tire and pry them both over the rim. Check the rim tape and make spoke nipples are in place. There rear tires always SUCK! It's a job I hate. mad

The trick with this method is making sure the tube doesn't get pinched between tire bead and rim. If you're careful this won't happen. Watch the bead lock too making sure it's all the way in the tire cavity and not pinching the tube. I'll inflate to 35-40 PSI to set the bead then back down to 10-12 PSI.

Lubricant like soap or WD40 really helps when prying the tire on/off. I use 3 spoons and get Jeannie to help hold the 3rd. I'm glad when the job is done. Hope this helps.
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#144826 - 04/03/19 06:50 PM Re: Front tire pressure with no rim lock [Re: FlipOne]
InsaneDiego Offline
Junior Member

Registered: 05/06/17
Posts: 37
Loc: San Diego CA
Thanks, Paul49 & Muniac.

Haven't been on the site much, been riding too avidly!

I've dropped down a few lbs. (tire pressure - not me!) and been riding 15 PSI both front and rear which seems to work fine between sandy washes and densely rock-laden trails.

Anza Borrego is on fire with wildflowers...a true superbloom in CA deserts w/all the rain this year.
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Home Base: 33 N / 117.3 W

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#144829 - 04/03/19 07:40 PM Re: Front tire pressure with no rim lock [Re: FlipOne]
Muniac Offline


Platinum Member
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Registered: 01/16/04
Posts: 5848
Loc: Montrose, CO
U R Welcome. I swear by lower tire pressures for trail riding. Caution indicated for pinch flats. I don't beat the bike over rock edges and haven't had pinch flat issues. Always use the HD motocross tubes. Cactus tines are another problem. Nothing stops them!
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