At 48/16 and cadence 65 you'll be at 15.5 mph
At 48/16 and cadence 75 you'll be at 17.9 mph
Good news is, on your new gearing of 52/12 and 65 cadence you'll be flying along at 22.35 mph
What gear ratios are you running?.....
- Thread starter BeardyAndyM
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At 48/16 and cadence 75 you'll be at 17.9 mph
Good news is, on your new gearing of 52/12 and 65 cadence you'll be flying along at 22.35 mph
D
Deleted member 1258
Guest
The link is to a Cycle Chat thread about a fixed wheel forum ride we did in 2014, we did a 108 mile day ride, I'm the grey haired grey bearded rider on the Pearson..
https://www.cyclechat.net/threads/100-mile-fixed-gear-ride-spring-2014.136598/page-16
Emile Flournoy
Formerly known as Yellow-Road
- Location
- Covington
Ha ha ha...thanks for the vote of confidence. 23mph??? In my dreams.... Maybe for a couple of hundred yards.At 48/16 and cadence 65 you'll be at 15.5 mph
At 48/16 and cadence 75 you'll be at 17.9 mph
Good news is, on your new gearing of 52/12 and 65 cadence you'll be flying along at 22.35 mph
If you can't hold a 'medium' cadence like 80-85 for an hour or so, maybe train with this in mind. You will see bigger gains going this way than upping your gear ratio and (potentially) buggering up your knees. As a youth I was a sprinter (runner), and awful running long distances, but I've managed to train my legs muscles to go distance and not just 'quick twitch' sprints.
Cadences of 150 and above are utterly pointless as an example of leg power/capabilites. Using a fixed wheel and spinning up these high numbers is about hanging on for dear life not producing power. That's why I believe that a single speed with freewheel capability is a better and safer way to enjoy a simple way to cycle.
Aim to gear your bike for the terrain you live in or the event, have a cadence between 80-100rpm.
Aim to gear your bike for the terrain you live in or the event, have a cadence between 80-100rpm.
iandg
Legendary Member
- Location
- Dumfries and Galloway
At 48/16 and cadence 65 you'll be at 15.5 h
At 48/16 and cadence 75 you'll be at 17.9 mph
Good news is, on your new gearing of 52/12 and 65 cadence you'll be flying along at 22.35 mph
I managed 20mph for an 18 mile time trial last week. Riding 42x17 with 32c tyres - 101 rpm for 52 minutes
Copy from the fixedwheel website
The first and most obvious record to mention is the medium gear 25 mile time trial record. For many years this was held by Tony Doyle with a time of 56-30, but on sunday the 4th of april 1999 Ray Hughes destroyed the record with a time of 55-03 in the Mid Oxon event on the H25/13B, what else can I say.
These will be on a 72" fixed gear
The first and most obvious record to mention is the medium gear 25 mile time trial record. For many years this was held by Tony Doyle with a time of 56-30, but on sunday the 4th of april 1999 Ray Hughes destroyed the record with a time of 55-03 in the Mid Oxon event on the H25/13B, what else can I say.
These will be on a 72" fixed gear
ChrisEyles
Guru
- Location
- Devon
72" sounds about right to me. I was running 69" on fixed (46 x 18 with 27" wheels) and found it great for climbing but scary spinning away down the Devon hills.
Enjoyed riding fixed a lot but don't think I'd go back to it while I'm living somewhere with so many steep descents.
Enjoyed riding fixed a lot but don't think I'd go back to it while I'm living somewhere with so many steep descents.
D
Deleted member 1258
Guest
Fixed gear gearing is usually a compromise, low enough to enable the rider to climb most of the local hills, but high enough not scare the rider crapless spinning down the other side. Even geared sensibly if you're on fixed you're going to be doing silly RPM on the descents, I haven't ridden single speed since I was in primary school, theres nothing wrong with a fixed, I use mine these days just as a winter bike, I used to use mine for commuting as well and found it an enjoyable way of getting around.
Emile Flournoy
Formerly known as Yellow-Road
- Location
- Covington
After reading all the great info here from cyclists who have a heckuva lot more experience than I decided to remain at my factory setting of 48:16 which seems fast enough. What ultimately made my mind up was Whorty's post about rpm. I went out and closely watched my rpm and I was clocking 18mph and there's no way I was exceeding 65rpm, in fact it was more like 60 at the most and thats fast enough for me. Whorty is right, I mean if I can't sustain 60rpms on flat ground at sea level for more than a mile I'm in pitiful condition and its me NOT the bicycle that needs to change. I'm really beginning to understand why the inventor of the TDF forbid derailleurs.
"I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)
"I still feel that variable gears are only for people over forty-five. Isn't it better to triumph by the strength of your muscles than by the artifice of a derailer? We are getting soft...As for me, give me a fixed gear!"-- Henri Desgrange (31 January 1865 - 16 August 1940)
79" gear inches is quite a tall gear for riding unless pan flat. 48*16@75rpm is 17.71 mph
Ideally you want to be around 80-85 or slightly higher
This table shows what speed with 3 different chainring sizes and various cogs will attain. Ive used this Bikecalc website many times. It has been very accurate in comparison to real world numbers. You would be better having a 48*17 to lift your cadence to 80 or 48*18@ 85rpm. The ratios I suggest all result in 17.7mph+/- a few points
I use the same site Andy ... worked really well for me when planning the 100 miler and the gear to use.
spark303
Guru
You can! I use a 12t sprocket on my Mk3 Moulton with 16” wheels to get a reasonable gear (70”) without using a dinner plate sized front chainring
Velodromeshop have a few 12t sprockets
https://www.velodrome.shop/track-sprockets/velodrome-shop-elite-1/8-track-sprockets/
https://www.velodrome.shop/track-sprockets/velodrome-shop-elite-1/8-track-sprockets/
iandg
Legendary Member
- Location
- Dumfries and Galloway
I use the same site Andy ... worked really well for me when planning the 100 miler and the gear to use.
htt /www.machars.net/bikecalc.htm is another useful site.
To calculate rpm the formula is:
[20160 x distance] / [gear x time] = rpm
distance = miles
time = minutes
gear = inches
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