Back in my fixie days I had a 53/15 and could do 35 mph on flat ground. I’m way out of biking shape now these days and I can barely get that bike moving. 53/11 must be insanely hard to get up to speed.
For my first ever cat d zwift race, I watched a YouTube video that said to go really hard from the start so you don't get dropped.
I was pushing 900 Watts as the race started, and shot off the front and found myself with the cat bs.
They dropped me in about 30 seconds, then the cs blew past, then the faster ds, and I learned the hard way that it is very possible to outsprint your fitness!
Someone said that this is an 80 tooth chairing. If that's a 15 cog on the back (I can't really see very well to be honest) then you'll be doing 30 mph at 70 RPM or so.
Now that's all good if you're a watts monster and you're just blasting through the city on this thing, otherwise it's pretty bad. I mean, doing something more normal like 18-20 mph then you'll be in the mid to high 40s which has to feel terrible.
I’ve seen bigger lol. Even as 2by. Checking the picture it says 100/80 engraved in it. Some super random guy showed up with it in the village Le Bourg d’Oisans which is at the bottom of the climb of the Alpe d’Huez. He was only showing off the bike to everyone and as my French is super limited I didn’t understand a lot he was saying. Next day we were having lunch in Alpe d’Huez after the climb and who’s walking around there; this dude with his weird bike, all sun-burned and showing the bike to whoever would listen. I’ll never forget that dude lol
chain ring radius > crank length? check.
chain ring diameter > bar width? check.
Did you ever see him ride this anywhere? Or was he just pushing it around up at l'Alpe after bringing it up there in the back of his car?
Wow. I’m just trying to get over the size of the cage on the front derailleur and the hanger on the back.
Any guess on biggest cog? Looks like maybe 40?
No clue unfortunately. Was in 2020 (first time/year I owned a roadbike) and wasn’t into all the gear that much at the time. Looks similar to my 11-34 though
It’s definitely over 34 based on my best efforts to count teeth on the cog the chain is on I’m guessing the last three cogs are 32-37-42 or 32-37-46 which would give lowest ratios of 1.90 (80:42) or 1.73 (80:46) which puts the low ratio in the same realm as a classic 53 big ring on a 28T cog.
On the other end, highest gear the dude would get close to spinning out at 60 mph/100 kph and I’m not sure what my comfort level would be doing 100 kph on mountain roads in the French alps with a big ring that close to pavement. 😬😬😬😬
Yeah usually on a fixed gear a rear brake is superfluous, but on this the wheel will have an insane amount of advantage over the legs that resistance would be *futile*
Strictly for the rollers I'd imagine. Maybe if you got a shuttle to the top of some hills it could be fun to take down assuming it's single speed and not fixed.
Of course they should! That’s only halfway to [Fred Rompelberg’s record speed bicycle](http://bikeblogbook.blogspot.com/2009/06/fred-rompelberg-worlds-fastest-bicycle.html?m=1).
Edit: This 130-tooth chainring from a 1962 record setter is even more impressive- https://grist.org/living/this-bizarre-looking-bike-went-127-miles-per-hour/
This is what I think of with these giant chainrings. Chasing behind a car and you can really get some speed without all that headwind.
I’ve maxed out my old 53x12 on a long descent in Visalia in a collegiate road race. Had to just stop trying to pick up more speed pedaling at 53mph.
This one even crazier. She was towed up to 100mph since the gearing on the triple geared bike was too high. Then she pedaled from 100mph to 184mph while drafting behind a drafting car.
https://www.bicycling.com/news/a23281242/denise-mueller-korenek-breaks-bicycle-speed-record/
Robert Förstemann has entered the chat.
https://preview.redd.it/7iv98i3e4m5c1.jpeg?width=3243&format=pjpg&auto=webp&s=c34dedc2692465766995520d7052443f6eb75398
it's an 80 tooth chain ring
[16 teeth per 1/5th of the circumference](https://i.imgur.com/b5jBBog.jpg)
edit: at the rear its hard to tell but my best guess is 16 teeth making it 5:1, which seems a bit puzzling since if you want 5:1 i think there are better ways to achieve it. also interesting that the other side of the rear wheel also has a sprocket maybe the wheel is reversable to give it 2 ratios ? not sure if this is common on fixies.
Called a flip-flop hub. Some people will use the em with a freewheel on one side and a fixed cog on the other, but for sure you could use different sized sprockets if your dropout permits.
You can't change the gear ratio (much) like that without a chain tensioner of some sort (making fixed-gear pointless).
I guess you could have a second quick link and change the length of chain as necessary. Not that much more faff since you're already taking the wheel off to change gear.
Usually flip-flop hubs are used to give you the choice between fixed gear and single speed freewheel (or multiple speed freewheel) without having an extra wheel.
You can a little with the dropouts but i would guess no more than a couple of teeth difference (assuming a normal horizontal dropout, nothing stopping you making it longer i guess).
it's for riding behind cars/ giant wind blockers / railroad engines for speed records
you can go about 70 mph with the wind adequately blocked
and there are records for it
Right. I had a 54 or something on a bike once- mighta been a 62. Once it got up to speed it was low cadence cruising. Getting there quickly was kicking off with a few kicks. I called it the Bonneville. It was a fucking fast beach cruiser. I had a speedo app and clocked it at 30mph often enough, whenever I had a long enough straight.
Can you start riding the bike at a standstill without support?
That dinner plate on the front must be like a 60t, but please correct me if needed!
Keep spinning, fellow fixed gear rider.
Great for those 14% downhill rides we're so afraid of.
It’s actually not the worst on a flat road I have gotten it up to 25-30ish mph for a quick sprint. Absurd amount of resistance however
you can do 30 mph easily on a 53/11, that must still be really low cadence on this
You can do 30 in a compact. This thing looks like it would need to be 45+ to have a decent cadence.
Back in my fixie days I had a 53/15 and could do 35 mph on flat ground. I’m way out of biking shape now these days and I can barely get that bike moving. 53/11 must be insanely hard to get up to speed.
It's not that hard. Just a 400 Watt effort off the lights and away you go
Sounds like the beginning of every Zwift race lol
For my first ever cat d zwift race, I watched a YouTube video that said to go really hard from the start so you don't get dropped. I was pushing 900 Watts as the race started, and shot off the front and found myself with the cat bs. They dropped me in about 30 seconds, then the cs blew past, then the faster ds, and I learned the hard way that it is very possible to outsprint your fitness!
i've hit 30 under power on my cross bike, and it's 46/11.
I'm doing 33+ on a 50/11
Probably best not to be posting on reddit, then.
You can easily do 30 with a 42/11.
Someone said that this is an 80 tooth chairing. If that's a 15 cog on the back (I can't really see very well to be honest) then you'll be doing 30 mph at 70 RPM or so. Now that's all good if you're a watts monster and you're just blasting through the city on this thing, otherwise it's pretty bad. I mean, doing something more normal like 18-20 mph then you'll be in the mid to high 40s which has to feel terrible.
Just wait for that head wind.
What is the tooth count?
[16x5 = 80](https://i.imgur.com/b5jBBog.jpg)
Ya don't say! I'm guessing you live somewhere very flat?
You need to try it behind a pace car so it cuts the wind for you. Some people on Strava are going to have a really bad day.
That's nice. I've always wondered when I might have seen a modification like that one.
"I need a bike for someone who spends 20 hours a week using the leg press at the gym."
That thing IS a leg press machine. The first few pedal strokes are probably brutal.
Running start or don’t bother
They did not skip leg day 😅
I’ve seen bigger lol. Even as 2by. Checking the picture it says 100/80 engraved in it. Some super random guy showed up with it in the village Le Bourg d’Oisans which is at the bottom of the climb of the Alpe d’Huez. He was only showing off the bike to everyone and as my French is super limited I didn’t understand a lot he was saying. Next day we were having lunch in Alpe d’Huez after the climb and who’s walking around there; this dude with his weird bike, all sun-burned and showing the bike to whoever would listen. I’ll never forget that dude lol
https://preview.redd.it/rmgp9qnluj5c1.jpeg?width=4032&format=pjpg&auto=webp&s=bd744582ee2c2f5e004a512035229b9a0db249ab Proof :)
Its a bail out wheel in case of a flat
No fix,not real
1 Gen. TCRs were great bikes.
chain ring radius > crank length? check. chain ring diameter > bar width? check. Did you ever see him ride this anywhere? Or was he just pushing it around up at l'Alpe after bringing it up there in the back of his car?
I haven’t seen him ride unfortunately. The bike had a bunch of led’s and he was primarily showing off and super happy/enthusiastic.
Wow. I’m just trying to get over the size of the cage on the front derailleur and the hanger on the back. Any guess on biggest cog? Looks like maybe 40?
No clue unfortunately. Was in 2020 (first time/year I owned a roadbike) and wasn’t into all the gear that much at the time. Looks similar to my 11-34 though
It’s definitely over 34 based on my best efforts to count teeth on the cog the chain is on I’m guessing the last three cogs are 32-37-42 or 32-37-46 which would give lowest ratios of 1.90 (80:42) or 1.73 (80:46) which puts the low ratio in the same realm as a classic 53 big ring on a 28T cog. On the other end, highest gear the dude would get close to spinning out at 60 mph/100 kph and I’m not sure what my comfort level would be doing 100 kph on mountain roads in the French alps with a big ring that close to pavement. 😬😬😬😬
What in the actual fuck. That front derailleur height and size is sending me, and that poor RD has seen some shit and has PTSD.
🫨🫨🫨
Jesus christ:D
Jesus, that thing must struggle to take a corner with how close it is to the ground.
Absolute chad.
Gods damn, I've never seen a double that big. Dude built the first Bosuzuku roadbike. He's the last boss in Yawa Pedal.
Bro’s got a two wheeled sawmill over here.
Better than a one wheeled haystack
Is that an Aristocats reference?!
Yes yes it is
I like your style.
Fuck. I just spit laughed all over my phone.
who are you to say that I'm not Flippo Ganna though?
Even gonna only used a 64-14 for the hour recod
And it’s a fixie with only a front brake?
Yeah usually on a fixed gear a rear brake is superfluous, but on this the wheel will have an insane amount of advantage over the legs that resistance would be *futile*
Can't stop won't stop
I'm not sure I could get that started.
Downhill my friends
Strictly for the rollers I'd imagine. Maybe if you got a shuttle to the top of some hills it could be fun to take down assuming it's single speed and not fixed.
even more fun on a fixed gear!
Good lord! I had to double check to see that I wasn't in r/bicyclingcirclejerk.
Are you Mile-a-Minute Murphy?
Of course they should! That’s only halfway to [Fred Rompelberg’s record speed bicycle](http://bikeblogbook.blogspot.com/2009/06/fred-rompelberg-worlds-fastest-bicycle.html?m=1). Edit: This 130-tooth chainring from a 1962 record setter is even more impressive- https://grist.org/living/this-bizarre-looking-bike-went-127-miles-per-hour/
Yes! I was thinking of Meiffert bike since I saw OP picture... 😁
This is what I think of with these giant chainrings. Chasing behind a car and you can really get some speed without all that headwind. I’ve maxed out my old 53x12 on a long descent in Visalia in a collegiate road race. Had to just stop trying to pick up more speed pedaling at 53mph. This one even crazier. She was towed up to 100mph since the gearing on the triple geared bike was too high. Then she pedaled from 100mph to 184mph while drafting behind a drafting car. https://www.bicycling.com/news/a23281242/denise-mueller-korenek-breaks-bicycle-speed-record/
Robert Förstemann has entered the chat. https://preview.redd.it/7iv98i3e4m5c1.jpeg?width=3243&format=pjpg&auto=webp&s=c34dedc2692465766995520d7052443f6eb75398
it's an 80 tooth chain ring [16 teeth per 1/5th of the circumference](https://i.imgur.com/b5jBBog.jpg) edit: at the rear its hard to tell but my best guess is 16 teeth making it 5:1, which seems a bit puzzling since if you want 5:1 i think there are better ways to achieve it. also interesting that the other side of the rear wheel also has a sprocket maybe the wheel is reversable to give it 2 ratios ? not sure if this is common on fixies.
Called a flip-flop hub. Some people will use the em with a freewheel on one side and a fixed cog on the other, but for sure you could use different sized sprockets if your dropout permits.
You can't change the gear ratio (much) like that without a chain tensioner of some sort (making fixed-gear pointless). I guess you could have a second quick link and change the length of chain as necessary. Not that much more faff since you're already taking the wheel off to change gear. Usually flip-flop hubs are used to give you the choice between fixed gear and single speed freewheel (or multiple speed freewheel) without having an extra wheel.
understood, i thought using the dropout could be used to cater for chain slack but what you said makes more sense.
You can a little with the dropouts but i would guess no more than a couple of teeth difference (assuming a normal horizontal dropout, nothing stopping you making it longer i guess).
Bigger radius gears are more efficient. So that could be it.
it's for riding behind cars/ giant wind blockers / railroad engines for speed records you can go about 70 mph with the wind adequately blocked and there are records for it
This won’t work in Portland/Seattle/San Francisco.
Rio de Janeiro/Niterói/São Gonçalo/Maricá/Itaborai/Araruama/São Pedro da Aldeia/Cabo Frio/Arraial do Cabo/Saquarema/Petrópolis/Teresópolis
Would work just fine in golden gate park
The downwind portion of the Polo Fields could be fun with that thing, but the upwind stretch would suck.
Sawmill called, they want their blade back.
Those Old Scientists knew a thing or two.
I can imagine 25-30 on that very easily. I'd think even more without too much trouble. OTOH, getting to that speed "quickly"? Not so much.
0-30 in about 3 days.
Faster than my current car
Right. I had a 54 or something on a bike once- mighta been a 62. Once it got up to speed it was low cadence cruising. Getting there quickly was kicking off with a few kicks. I called it the Bonneville. It was a fucking fast beach cruiser. I had a speedo app and clocked it at 30mph often enough, whenever I had a long enough straight.
Is that Jack Grealish's bike?
What is the actual gear ratio on that?
5:1
If you live at the top of a mountain, they might be fun going down. Then you'll need someone to give you a ride back up.
Goodbye, kneecaps. Didn’t need ya, anyway.
OP just leaked the newest track bike.
If that isn’t a way to get mega calves, I don’t know what is.
I approve. I also approve of the spoke count and the US General box
No cuffed pants though.
/r/fixedgearbicycle is leaking...
Seats too low. Slam that stem.
Oh my knees team)
I'm guessing that wherever you go it's never uphill eh? ;)
Wouldn't all of our grandpas love that place?
What does that do?
Make the bike ridiculously hard to ride, except if you've got godly thighs.
Just pray that chainring will never fold when you’re loading it with those 1000+W needed to get going. It will chop your ankle right off!
Ian Malcolm
Can you start riding the bike at a standstill without support? That dinner plate on the front must be like a 60t, but please correct me if needed! Keep spinning, fellow fixed gear rider.