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Old 21 August 2009, 10:07   #1
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Horizontal spare wheels

I had an interesting fallout form a puncture on my box trailer last night, and thought I would share it so that nobody else gets caught out.

Usual story of a puncture, tyre went pop, trailer leans over, so I pull in and change the tyre. No drama....until I pumped the spare up.

The spare gets pumped up by me sort of regularly - ish, primarily because it is mounted horizontally on the drawbar and by keeping it pumped up, the upper tyre rim is kept in contact with the top wheel rim. Actual pressure is mildly irrelevant, as I have a foot pump in the boot of the car so can top it up as required.

Said spare has been there for well over 7 years, but has spent a small proportion of that time fully inflated, mostly sat there at about 8-12PSI. As I pumped it to working pressure, I realised that it started lo leak round the rim. drop pressure to the storage pressure - stops leaking. Turns out that because it has spent so long on it's back, all that nice grit & road dirt that accumulates had been washed into the crevasse between the tyre & the rim which forms a nice dirt trap.

When Pumped to working pressure, the tyre expanded slightly closing the crevasse, where the grit pushed it away from the rim. No problem I thought, a few mins at 60 will clear it..... Nope. I had to stop every 5 miles all the way home to pump it up to working pressure.


The moral of the story -Those of you with horizontally stored spares either make sure they are kept at working pressure or covered. I am going to buy a full cover for mine this weekend.
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Old 21 August 2009, 10:15   #2
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I moved my spare wheel on the RIB trailer from horizontal on the draw bar to vertical on the side frame only a month ago, partly for your reason and partly because parts of it were flling up with rain water.

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Old 21 August 2009, 11:50   #3
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Yeah, I modified an old mini hub cap to stop the centre turning into a bird bath..... Didn't help the rim tho'!
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Old 21 August 2009, 15:41   #4
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Mine is mounted semi-horizontal (it's a bracket designed to sit under the bow of a hard boat parallel to the flare of the bow, but it sat too low, and as such got turned 90 degrees.) It collects a bit of water in the bead, but not much.

It stays at working pressure.

Makes a handy table for lunch as well.

jky
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Old 21 August 2009, 20:34   #5
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Mine is mounted in the back of the 110 - it smells a bit odd, but then, so does the 110....
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Old 21 August 2009, 21:29   #6
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Mine is mounted in the back of the 110 - it smells a bit odd, but then, so does the 110....
Why not let her stay in the house for a bit then mate. After all you did marry her!






Oh the spare wheel! Sorry, ignore me!
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Old 21 August 2009, 21:50   #7
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Why not let her stay in the house for a bit then mate. After all you did marry her!






Oh the spare wheel! Sorry, ignore me!
Listen up CS hag! ...one more pop at the Ribbing Permissions Officer and you'll think WOW is the Teddy Bear's Picnic....

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Old 21 August 2009, 21:52   #8
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Listen up CS hag! ...one more pop at the Ribbing Permissions Officer and you'll think WOW is the Teddy Bear's Picnic....

Told you have been, Padawan Learner
Use some force young wIlLk
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Old 21 August 2009, 22:02   #9
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Use some force young wIlLk
wIlLk - ah, I geddit now!

Friday Night, PWP, more power to yer elbow, ye rip!

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Old 21 August 2009, 22:10   #10
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wIlLk - ah, I geddit now!

Friday Night, PWP, more power to yer elbow, ye rip!

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Old 22 August 2009, 12:26   #11
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our spare was horizontal on the searider trailer and kept in contact with the drawbar by tyre pressure-ended up with a couple of nasty bulges in the tyre wall
any references to being mounted have been deliberately deleted in order to avoid a trip to the bilges
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Old 22 August 2009, 14:25   #12
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First of all I'm glad you got home eventually.

I've always kept mine in the back of the car even if the missus did moan about the lack of space (no problems with new car). I have a wheel mount on the trailer that stores the wheel vertically, but I was always worried about theft, even with a chain or bike lock. I'd probably lose the key or combination or when I needed to get it off the lock would be rusted solid. But that's my kind of luck
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