Author Topic: V85TT magnet for nails in the rear tire  (Read 4077 times)

Offline azccj

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V85TT magnet for nails in the rear tire
« on: May 04, 2026, 09:31:57 PM »
Yesterday I was out riding my 2022 V85tt Tavel, up in Northern AZ. As I was leaving Seligman, I looked down at the dash and noticed the OEM TPMS indicating I had just 15 psi in the rear tire. This is the fourth nail I've got stuck in that bike's rear tire in 22,500 miles. I pulled off the road, pulled out my emergency kit, removed the 2 1/2" nail and plugged and then aired up the rear tire. I was backed on the road within 20 minutes and rode 100+ miles home.

I have never had a bike that has gotten more punctured tires than the V85tt. But I am glad the bike has a TPMS, as I was able to monitor the rear tire pressure on the ride home. I just wish the bike would do a better job of warning the rider when there's a tire pressure problem. How it works on the V85tt and probably other MG bikes equipped with this feature, is when the TPMS sensors in the rear tire indicates a tire pressure of 36 PSI or less, the dash will begin showing the tire pressures both front and back, along with a tiny little triangle next to the tire pressure which is low. No flashing light like the one for the stupid cruise control, nothing flashing on the dash, just the tiny little triangle. It is very easy not to notice this warning. In my case yesterday, I didn't notice the warning for 21 psi of a slow leak.

I really like the way warnings are displayed on my Husqvarna Norden 901. When there's an issue, nearly half the dash turns sun bright yellow and is impossible to miss it.
« Last Edit: May 04, 2026, 09:34:42 PM by azccj »
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Offline Dr. Enzo Toma

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Re: V85TT magnet for nails in the rear tire
« Reply #1 on: May 05, 2026, 02:26:46 AM »
Unless there's a lower secondary fender, it's hard to pull this off on "beak" style bikes, but I've had good luck with running front fender extensions. The theory being that the front tire kicks up sharps and the rear catches them. If you have a low fender or flap behind the front tire, it can potentially knock the sharp down before the rear tire makes it to it. It looks like there is at least one such product out there for the V85TT:
https://www.powerbronze.com/moto-guzzi-v85tt-19-21-650-m102.html

On my V7 850 I have the Pyramid Extenda Fenda.
« Last Edit: May 05, 2026, 02:28:34 AM by Dr. Enzo Toma »
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Online kballowe

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Re: V85TT magnet for nails in the rear tire
« Reply #2 on: May 05, 2026, 06:00:13 AM »
The past couple of years we've had a lot of re-roofing in our area.  Four flat tires on the bike (tube tire) and one each on the cars.  None of the bikes have TPMS but the cars have it.

Before that - I don't think I had a flat tire in ten years.
« Last Edit: May 05, 2026, 06:01:57 AM by kballowe »

Offline Moparnut72

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Re: V85TT magnet for nails in the rear tire
« Reply #3 on: May 05, 2026, 09:29:13 AM »
The V100's tire pressure monitor light up bright red when the pressure gets below or surprisingly too high. Happens when the the pressure is a bit high when filled but not over the recommended pressure. After a few miles as the pressure increases the red comes on.
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Online Perazzimx14

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Re: V85TT magnet for nails in the rear tire
« Reply #4 on: May 05, 2026, 11:32:19 AM »
I'm not sure any fender extender will extend low enough to knock over any road swarf that had been up righted by the front tire. You could always hang a strip of rubber from the skid plate as a knocker over'er.
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Offline Dirk_S

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Re: V85TT magnet for nails in the rear tire
« Reply #5 on: May 05, 2026, 11:37:17 AM »
It took 4 comments in before I stopped wondering when the magnet hack gets mentioned.
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Offline red stripeguz

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Re: V85TT magnet for nails in the rear tire
« Reply #6 on: May 05, 2026, 01:10:04 PM »
My (new to me) Norge picked up 2 nails relatively quickly soon after I rode it back to Texas. Fairly new tire as well. I still have that tire in my garage thinking I'll patch and use it if need be
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Offline JHBettsSr

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Re: V85TT magnet for nails in the rear tire
« Reply #7 on: May 05, 2026, 05:17:32 PM »
Yesterday I was out riding my 2022 V85tt Tavel, up in Northern AZ. As I was leaving Seligman, I looked down at the dash and noticed the OEM TPMS indicating I had just 15 psi in the rear tire. This is the fourth nail I've got stuck in that bike's rear tire in 22,500 miles. I pulled off the road, pulled out my emergency kit, removed the 2 1/2" nail and plugged and then aired up the rear tire. I was backed on the road within 20 minutes and rode 100+ miles home.

I have never had a bike that has gotten more punctured tires than the V85tt. But I am glad the bike has a TPMS, as I was able to monitor the rear tire pressure on the ride home. I just wish the bike would do a better job of warning the rider when there's a tire pressure problem. How it works on the V85tt and probably other MG bikes equipped with this feature, is when the TPMS sensors in the rear tire indicates a tire pressure of 36 PSI or less, the dash will begin showing the tire pressures both front and back, along with a tiny little triangle next to the tire pressure which is low. No flashing light like the one for the stupid cruise control, nothing flashing on the dash, just the tiny little triangle. It is very easy not to notice this warning. In my case yesterday, I didn't notice the warning for 21 psi of a slow leak.

I really like the way warnings are displayed on my Husqvarna Norden 901. When there's an issue, nearly half the dash turns sun bright yellow and is impossible to miss it.
Man I hear you, My '17 Triumph T120 Bonneville had 6 flats in 5 years. The Triumph has tube type tires and the tubes "explode" when a screw/nail is picked up. That's a big reason I added the V85TT with tubeless tires.
'17 Triumph Bonneville T120
'13 BMW K1600GT
'25 Moto Guzzi V85TT

 

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