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Folding Bikes Discuss the unique features and issues of folding bikes. Also a great place to learn what folding bike will work best for your needs.

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Old 07-10-08, 09:22 PM   #1
stevegor
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Stevegor's NEED FOR SPEED

Always loved going fast on bikes, especially down mountains or pacing behind trucks and buses, so I was wondering......my R20 has an 8 spd SA hub in 451 rims with a 48t chainring and a 25t rear gog, 8th gear is quite tall, what if I installed that spare 58t chainring I have and get a friend to pace me behind a car or motorbike, I wonder what speed I can achieve?
Don't worry about me not being able to turn the cranks with such high gearing, my best pacing speed behind a bus on a flat road is 78.5kmph and I needed more gear inches.
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Old 07-10-08, 10:23 PM   #2
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Get yourself a 19t cog as well, and really break some records....
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Old 07-11-08, 12:33 AM   #3
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Get yourself a 19t cog as well, and really break some records....

Maybe, but by my demented calculations I should get well over 80kmh with the 58t x 25t...that's enough on a R20

Last edited by stevegor; 07-11-08 at 12:34 AM. Reason: add
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Old 07-11-08, 03:51 AM   #4
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Pah - either do it, or don't do it!
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Old 07-11-08, 04:08 AM   #5
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Stevegor you might break 90kmph if you used a rear pacer with Sammyboy riding naked behind you on his Downtube!
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Old 07-11-08, 04:45 AM   #6
LittlePixel
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12 on the back; 62 on the front, with Schlumf Speed-drive in the Bottom bracket.
ZOom ZoOM!
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Old 07-11-08, 09:19 AM   #7
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Stevegor you might break 90kmph if you used a rear pacer with Sammyboy riding naked behind you on his Downtube!
That thought scares the hell outa me....I reckon I'd break 180kmh if that happened

Last edited by stevegor; 07-11-08 at 09:20 AM. Reason: correction
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Old 07-11-08, 09:22 AM   #8
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Baked Bean gas. Said to be good for adding another 5 kp/h.
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Old 07-11-08, 11:09 AM   #9
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Ive done an an average speed of over 40 mph for 5miles flattish road

also done an average of 21mph for 53miles to Aberdeen. Not very flat. reved out in top going past Stonehaven.

But that was on my Bob Jackson road bike. With a 52 X 13 with 700c size sprints and tubs
that bike flew and I was a little bit fitter then

Have seen 38mph on my grifter on the beach
thats a similar bike to the shopper
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Old 07-11-08, 12:08 PM   #10
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Baked Bean gas. Said to be good for adding another 5 kp/h.
And in Snafu's case +20kmph

SNAFU21= SUPER NANOCHARGED AUTOMATED FARTING UNIT (21 HORSEPOWER)

PFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFT


SNAFU21 TRYIONG OUT 1ST PETROL/FART POWERED HYBRID BEFORE THE FOLDING BIKE PROPULSION SYSTEM IN 2001 WAS PERFECTED USING A SMALLER CAN OF TESCO VALUE BAKED BEAMS 420G CAN

Last edited by mulleady; 07-11-08 at 12:15 PM.
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