Crr for wide rims lower pressure

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still-chasing
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Joined: Sun Mar 28, 2010 5:23 pm

Crr for wide rims lower pressure

Post by still-chasing » Tue Sep 25, 2018 9:31 am

Quick question on CRR. As the new wheels are wider now and the required pressure is lower, does the value of CRR in the settings have to be manually change to .55? When I did my initial setup for Cal Ride, one of the options in the setup is the tire pressure. I set it to 90psi for my wider rim wheelset compared to 100psi using my older,narrower wheelset. This drops my CRR to .0047 compared to .0058 The lower psi now on new wheels makes them roll better. I actually have to drop the psi again to 85 after a test ride. Please advice what to do. Attached is the profile for 90psi
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Velocomp
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Re: Crr for wide rims lower pressure

Post by Velocomp » Tue Sep 25, 2018 10:26 pm

Are these road bike tires? What kind?
John Hamann

still-chasing
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Re: Crr for wide rims lower pressure

Post by still-chasing » Wed Sep 26, 2018 1:29 am

Yes they are for a road bike. Enve 3.4 SES rims. and continental grand prix 4000s II. The options I chose were, Tires-premium, Hoods elbow bent, tire pressure 90psi (but will drop it to 85psi).

Velocomp
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Re: Crr for wide rims lower pressure

Post by Velocomp » Wed Sep 26, 2018 1:43 am

I think your profile settings are fine.
John Hamann

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Re: Crr for wide rims lower pressure

Post by still-chasing » Wed Sep 26, 2018 8:46 am

Should I do another CalRide when i lower the psi to 85?

Velocomp
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Re: Crr for wide rims lower pressure

Post by Velocomp » Wed Sep 26, 2018 10:52 am

No need
John Hamann

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Re: Crr for wide rims lower pressure

Post by still-chasing » Wed Oct 10, 2018 9:05 am

Finally found a sweetspot for my tire pressure. It's 80psi. They're 10psi less when I did my first CalRide. Should I do another CalRide? If so, please advise what settings to set before CalRide. Should I manually change the settings of the tire pressure and tire width in the setup menu? Also, do you suggest a new CalRide if my weight change 5lbs+/- from original Calride? Thanks.

My bike setup:
Road bike, Enve 3.4 rims 27.5mm wide, 23mm Conti 4000s, 80psi

Velocomp
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Re: Crr for wide rims lower pressure

Post by Velocomp » Wed Oct 10, 2018 5:48 pm

No, there's no need to do a new cal ride for the tires.

You can adjust your weight in the profile; you won't have to do a new cal ride.
John Hamann

still-chasing
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Re: Crr for wide rims lower pressure

Post by still-chasing » Thu Oct 11, 2018 8:42 am

Thanks

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