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Tarmac tyre pressures

Old 05-22-18, 04:12 AM
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taz777
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Tarmac tyre pressures

I only ride my fatbike on regular roads and hard cycle paths. The pressures I use ar around 20PSI for the rear tyre and 18PSI for the front. I'm wondering whether I should lower the pressures a little? What pressures would you guys recommend for riding on tarmac? My fattie has 4-inch Jumbo Jims.
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Old 05-22-18, 04:03 PM
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I had never seen one of those!
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Old 05-23-18, 07:40 AM
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I am running similar pressures but have no idea if that is ideal or not so watching this thread with interest.
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Old 05-23-18, 01:25 PM
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I experimented a bit today by setting pressures as follows:

Front: 12 PSI
Rear: 15 PSI

The ride was MUCH better. The bike seemed more planted to the road and I felt a lot more in control of the bike. I'm going to drop the pressures by a further 1-2 PSI on my next ride but I think I'm already at the sweet spot for my bike. It felt like a completely different bike with bumps being soaked up a lot better and, overall, the ride felt smoother. This was over a distance of 25KM (15 miles).
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Old 05-30-18, 08:58 AM
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I've got the 4.8" JJ. I was actually going UP from 10#. Last ride was 13#, I think it still would feel better a bit higher, unfortunately my "precision" gauge is near the end of its range at those pressures.
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Old 06-02-18, 09:15 PM
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HerrKaLeun
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I use a 15 psi gage.

~6 psi front and ~12 psi rear (I weigh 175#). I go on tarmac to go to the trails, but never adjust pressure forth and back since that tiny difference in rolling resistance is less than my pumping energy.

I assume you use higher pressure because of rolling resistance. I never noticed a difference. The resistance is because of the tread pattern, not how much pressure you have (within reason)
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Old 06-05-18, 09:54 AM
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Roads and hard paths? Why fatty/ Tried some slicks like black floyds or some Vee speedsters?
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Old 06-06-18, 02:37 PM
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Originally Posted by Leebo View Post
Roads and hard paths? Why fatty/ Tried some slicks like black floyds or some Vee speedsters?
When the Jumbo Jims wear out then I'll replace them with tyres more suitable to road cycling.
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