Rear end ratio
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RRoller123
- Patron 2020
- Posts: 8179
- Joined: Sun Nov 13, 2011 2:04 pm
- Your car is a: 1980 FI SPIDER 2000
- Location: SAGAMORE BEACH, MA USA
Re: Rear end ratio
185/70-13
'80 FI Spider 2000
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
'74 and '79 X1/9 (past)
'75 BMW R75/6
2011 Chevy Malibu (daily driver)
2010 Chevy Silverado 2500HD Ext Cab 4WD/STD BED
2002 Edgewater 175CC 80HP 4-Stroke Yamaha
2003 Jaguar XK8
2003 Jaguar XKR
2021 Jayco 22RB
2019 Bianchi Torino Bicycle
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baltobernie
- Patron 2020
- Posts: 3466
- Joined: Sun Nov 25, 2007 6:00 pm
- Your car is a: 1973 Spider [sold]
- Location: Baltimore, MD
Re: Rear end ratio
Me too, and we're seeing about the same discrepancy in speedo error.
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Keruth
Re: Rear end ratio
Ah, folks, tire size is the most common mistake on speed discrepancies you can make. The original tires were 165/80/13 and 185/70/14. I was 8mph off low with 165/60/13's. Cured that with a set of 15" Rota's from Allisons and some very sticky 195/55/15 BFG's. Local Gendarmes concurred!
I would like the smaller ratio rear gears anyway, should save gas too!
I would like the smaller ratio rear gears anyway, should save gas too!