gearing chart, anyone got one?

Hi all

Found this on a Yam site anyone got one for bants? or an expanded version

.......................13t.............14t..............15t..............16t.............16t
38t.................2.92............2.71............2.53............2.38............2.24 39t.................3.00............2.79............2.60............2.44............2.29 40t.................3.08............2.86............2.67............2.50............2.35 41t.................3.15............2.93............2.73............2.56............2.41 42t.................3.23............3.00............2.80............2.63............2.47 43t.................3.31............3.07............2.87............2.69............2.53 44t.................3.38............3.14............2.93............2.75............2.59 45t.................3.46............3.21............3.00............2.81............2.65 46t.................3.54............3.29............3.07............2.88............2.71 47t.................3.62............3.36............3.13............2.94............2.76 48t.................3.69............3.43............3.20............3.00............2.82 49t.................3.77............3.50............3.27............3.06............2.88 50t.................3.85............3.57............3.33............3.13............2.94


or something like if running on 14/54 what's the next option up or down then the next etc etc

I know some just run 15/54 all year round

see you all next year

Tony

new baby in Jan. Donno in April (if I'm lucky)

Tony,

Back in 1973 the club issued one in the mag. It was for KR76 tyres (Dunlop triangulars), and showed top gear speeds for engine rpm versus gearing.

The fastest speed on it was something like 105.6 mph, to which the author had added the suffix "phew!"

With the advent of excel should be asy to knock one up if you knew tyre rolling radius, which of course a reputable company like Dunlop does still publish

Got one now

Thanks Alan

No probs Tony,
The excel chart shows a factor that rises as per the gearing rises, the difference between the factors is the important bit to look for, after a cuople of gear changes you will get a feel for what the difference means on the circuit. Pete does the same thing but uses mph.
The change of a factor of 5 is V/small, a change of 15 to 20 noticably significant, a change of 20 to 30 a biggi !
I will put the chart on the main web pages when i get a minute spare from work and troubles.
Cheers,
Alan

The way I see it all circuits have got :- Start Lines, Hairpins, Straights, fast bends, slow bends, up hills, down hills. Therfore if 15/54 works for one it works for all circuits. The time saved can be better spent making bacon butties and tending barbees.

I must admit, I did change gearing once in the last two seasons for the woodlands circuit. The stress of it! never again.

Excellent Steve.

Good to have some commonsense in this forum.

Aidan and I have noticed how much less tea we drink when there' s gearing to be changed.