[Henry Chinaski]

I use a 13-21 with a 53/42 and a 13-23 with a 53/39 (7 speed). I don't think I ever used a 12 even when racing. I used to have a friend who could outsprint anyone with his junior gearing (do they still do that?). Once I've spun out in my 53x13 I figure I'm going fast enough.

 

[CycleFever]

Excel spreadsheet



I have one that I created that you input your cadence and cog combos, and it graphs MPH and gear ratios for you automatically. Just email me at surveyor12 @ comcast . net and I'll send it.

I was wondering if you could share your spread sheet chart with me. I tried send you an email but guess this is outdated. I’m trying to learn as much as I can, being a road bike enthusiast with just 6 months into riding during this pandemic. I’m in fairly good athletic shape for an older gentleman. I’m riding 100+ miles a week, northern California.
Still learning. I’m currently riding used Specialized Allez Elite 2006-7, which I just upgraded to 10 speed altegra groupset - 53/39 and 11/28. So far I’m loving this new found venture.

 

[jetdog9]

Wow, 16 year dredge...

Go to bikecalc.com and you may find what you are looking for:

BikeCalc.com - Bicycle Gear Speed Chart

www.bikecalc.com

 

[Kerry Irons]

Wow, 16 year dredge..

Yeah, but his bike is only a little new than the thread so there's a sort of yin and yang there. NOTE: I'm still riding a 1998 bike, so this is NOT a dig at the age of his bike.

 

[CycleFever]

Wow, 16 year dredge...

Go to bikecalc.com and you may find what you are looking for:

BikeCalc.com - Bicycle Gear Speed Chart

www.bikecalc.com

Thank you!!

 

[DrSmile]

I keep this semi-updated... gain ratios are at the bottom.

Cogs.txt

drive.google.com