Low tire pressures? - Triumph Bobber Forum
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post #1 of 86 (permalink) Old 03-27-2017, 09:49 AM Thread Starter
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Low tire pressures?

I thought I noticed a different road noise last night and found both tires on my Bobber were 7 lbs low on air pressure. .. oh boy.
I've had my Bobber for 30 days and 375 miles.

Could be several causes I suppose...
1. It left the dealer that way? (They did gave me copy of their comprehensive pre-delivery check list.)
2. Dealer thinks 25 and 35 psi are proper psi's?
3. It's a normal break-in thing. tires are settling in. (ahh, not likely).
3a. Spoke and tube wheels always leak air... I know my old Harley Springer does.
4. I don't know how to measure psi or forgot how to read the air gauges I use. (I am old-ish :-)
5. Both gauges are wrong. (make that 3 of them now)
6. Both tires have taken on puncture wounds. I don't see anything.
7. Malfeasance .. just kidding

I have now topped the pressures off at 32 front and 42 rear psi as the user manual (p.116) lists.
Based on his dismissive attitude about my fuel gauge being wanky, I won't bother to tell my bike's service manager, he wont want to hear this.

Stay tuned...


P.S. I'm just loving this bike.
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post #2 of 86 (permalink) Old 03-27-2017, 11:28 AM
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Interesting.... as well as an interesting list of options. I would say periodically check up on it and see what the rate of deflation is over a certain period of time and gauge from there?
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post #3 of 86 (permalink) Old 03-27-2017, 11:58 AM
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Well, based on your situation I just checked my tires pressures too. Found them at 24 front, 36 rear? I really believe I had checked them before and they were set per manual. But......I may have forgotten, and didn't check them earlier? I reset at 32/42, tightened the valve cores (only able to get about 1/8 turn) and installed caps with gaskets. Mines about a month old too with 126 miles. I'll keep you updated when checked again a couple weeks. ??? Hope they're not leaking!
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post #4 of 86 (permalink) Old 03-27-2017, 03:06 PM Thread Starter
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oh good idea about tightening the schrader valve.

I turned both of mine an easy 1/4 turn.

thanks Forjox.
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post #5 of 86 (permalink) Old 03-27-2017, 04:54 PM
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My bike was also delivered with underinflated tires.
Tightened the valves and since then the pressures have been ok.
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post #6 of 86 (permalink) Old 03-27-2017, 05:38 PM
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Based on the thread, figured I better check. Mine were at 27.5/40.5. Not as bad but glad the thread got me to check. Have to keep an eye on it.

And I received no such checklist when I left the dealer. Would have been interesting to see.
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post #7 of 86 (permalink) Old 03-28-2017, 10:19 AM Thread Starter
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here's my dealer's pre-delivery checklist. hope its readable.

note, air pressure was checked 3 times. hmm?
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post #8 of 86 (permalink) Old 04-02-2017, 09:28 AM
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So that's what it look so like. Yeah, 3 checks.

Dumb question, you have heavy tempature swings this time of year or when it was put together? Like 60 then 30 the next day? That could affect the pressure.
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post #9 of 86 (permalink) Old 04-02-2017, 10:27 AM Thread Starter
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not really. the temps been moderate in the Tampa Bay area.
I'm guessing the tires will hold their pressure normally now.
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post #10 of 86 (permalink) Old 04-03-2017, 03:20 PM
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Quote:
Originally Posted by muensterDeath View Post
So that's what it look so like. Yeah, 3 checks.

Dumb question, you have heavy tempature swings this time of year or when it was put together? Like 60 then 30 the next day? That could affect the pressure.
Smart question actually since I have friends that live up in Buffalo who experience changes in tire pressure that are in line with the recent fluctuations in weather. Its a PITA but usually the ones better off are those who park underground at condos/apartments
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