Shop Owner Discovers THE PERFECT GEAR RATIO FOR ALL BIKES!
Shop Owner Discovers THE PERFECT GEAR RATIO FOR ALL BIKES!
In today’s tech Thursday brought to you by EPIC BMX (http://instagramcom/_epicbmx) via Phu Vu this Shop Owner Discovers THE PERFECT GEAR RATIO FOR ALL BIKES! This video discusses the ideal ratios for 20″ BMX bikes (the 36/13, 33/12, 30/11, 28/10, 25/9, 22/8) as well as the ratios for 24″ 26″ and 29″ BMX cruisers.
Join the AlfGang Discord:
https://discord.gg/sW8RQtyE
Join this channel to get access to perks:
https://www.youtube.com/channel/UCrl_daV-h86ILEd3syXwVSw/join
Thanks for taking the time to watch my content! If there’s anything you’d like to see, please let me know in the comments, and if you can, don’t forget to drop a like!
If you’d like to support Alfredo:
For merch visit: www.AlfredoMancuso.com
https://www.patreon.com/alfredomancuso
http://instagram.com/alfredomancuso
Tweets by AlfredoMancuso
https://www.facebook.com/alfredo.mancuso
Snapchat: AlfredoMancuso
Can I order ur products through online? From Philippines..I’m so desperate to build my own BMX And learn a lot from u what is better for me and this would be my 1st BMX ever to have and build ..ur so good and can’t stop listening to ur voice.
28/9 is the best. Has top end and low end.
Thank you for all the bmx content!!! They should make phu a playable character in the next bmx game
My kluncker has a 46 in the front and unsure in the back but I’m looking to see it I can put a 36 tooth on the front but don’t know if It’ll help pick the wheel up a little more,the size on the wheels are 26s I believe,it’s been broken for a minute and can’t quite remember
So I bought a 30t NWO sprocket. This would be ok on my cult 6 cruiser? It comes with a 10t cassette hub. Thanks
idk what ratio i have but its 28 to 12 threaded type
32/12 was the standard before 25/9
This guy doesn’t even know the difference from radius and circumference. He made some other mistakes as well.
I recommend a script and maybe some research next time.
Awesome video. I’m sticking with my 20" wheels though. Currently running 11/30 upgraded from a 9/25.
180mm, 45tooth – It was like having a bigblock. Out of my "crew", not even the dude with the 12speed could catch me.
Guilty! I over thunk this at first 2 but I have friends that have different set ups but great demo to illustrate the point.
Tyre size, rim size, sprocket ratios, crank arm length and the riders strength all come into play when choosing the right set up
Divide the front teeth (25) by back teeth (9)=27.77777778. Then multiply by the wheel diameter (20)= 55.55555.
That’s gear inches. So the bike should roll about 55 inches per crank revolution. But I think the 29ers are geared more like a 28×9 20 inch. 36t16t=2.25 x29 = 65.25 gear inches or 28t9t=3.11111 x 20 = 62.2222- gear inches. I’d probably run a 32×16 if I had a 29er because it’s hilly where I live.
Basically the engineers are smarter then us.
My 20inch bmx runs a 28t sprocket and 12t freewheel is it same on 25×9 gearing?
Front gear tooth number divided by rear gear tooth number times tire size equals the gear inches . 25 divided by 9 x 20 equals 55.5 gear inches. Old school 44 divided by 16 x 20=55. This is the gear inch ratio you are lookin for, give or take a few inches or fractions of an inch. So on a 29 inch tire you could go 33 divided by 17 x 29 = 56.2. Good enough. Or 30 divided by 16 x 29 = 54.3 gear inches. It’s essentially the same as the 25/9 on a 20 inch tire. I shoot for anywhere between 54- 58 gear inches. Easy peasy. I run 30/13 on my 24" S&M Dirtbike which works out to 55.4 gear inches. A higher gear inch number will give you more top end speed with less bottom end torque. And the reverse goes with a lower gear inch number. It all depends on your leg strength and spinning skills. If you like to spin hard go with 53/54. If you love top end speed and like to "chop wood" go around 57/58. Hope this helps.
2:25 2005 to 2009 25/9 gearing start to get on peeps Bmx’s I’m still running 25/9 gearing now till this day I’ve gone through The era of Bmx gearing 44 /16 45/16 36/13 28/9 25/9 👍🚲💨
It’s all math…
It’s funny. In 1984 when I was 14 I used a 44-13 with a 165 crank.
Wah wah wahhhh
That’s ball … my wheelie bike has 25 to 9 … and its a 26 its much better then standard
Fixed gear
I like the owner of this bike shop,,,straight up info
Dude; does your shop ship abroad? I want to put together a rigid fork DJ/FGFS/tracklocross hybrid (I know It may not working out but then I’d just swap out a couple of parts to turn it into either) but I’m having a hard getting the parts I need to do so!
You want to be hitting the quickest reps you can push at about 28mph. Depends on your legs, I’m long legged, rather than a "spinner". Do an exercise bike power meter, and find your peak power reps on full sprint, then get out your calculator. That ain’t for BMX, that’s for a single speed rider, but it’s my method.
Big ripper running 33 sprocket with a 16 freewheel. Perfect set up. Had a Sunday High C with the stock 30 sprocket/13 freewheel. Loved how it felt compared to the big ripper. Now I’m back on my ripper and I went to a really similar gear set (33/16)
Perfect for wheelies, not too little to rip it around town at a good pace. Idk why I don’t see 33/16 more often
33 front 9 back will have u cookin. Trust
Whoa, too much information for me. Math was not strong within. Nice Daisy Dukes though
what the phu!
Thank you for being the most high epic bike shop leader PHU man!
Alfredo is doing a great job with these videos.
Perfect ratio is 45-9. Fite me
I saw the first 29in bike the other day and was dien to try it so bad cuz I want one… dude said no lol. I was so bummed I offered for him to hold all my shit just a circle to feel it and nothing! lol
i need 6:1 (60/10) ratio before it hits my 20" solid carbon fiber wheel. i am 5′ 6.75" tall and 200 lbs lean. i go 60 mph on my early1980’s huffy pro thunder. Yup i got the crank for the leverage baby. only problem is , i need stronger material strength and use a single piece crank because i snap chains, strip out parts, and bend pedals everywhere. 🙂 Now it got rusted so need a new frame built. Going carbon aluminum and/or chromoly. i build my own gears because there is too much flex inherent in standard bicycle gears. i have to use a motorcycle chain. i am thinking of converting to a transmission without chain.
what would be a similar feel to a 28-9 but with a 33 tooth sprocket , both have 20in wheels?
i just switched from 25/9 to 30/9 on a 20" bmx, so much better.
Thanks for the vids wish I had bmx shop in my area
Front gear divided by rear times wheel size will give the gear ratio
I had no clue they felt the same. That makes me wanna get a 29” now!
Circumference not diameter
*ATTENTION* I’m not running any giveaways at the moment, if someone using my username contacts you please report it as spam!
It’s all about that crank length…amirite guys 🍻
Phu do you!
I love this video and I’m a mountain biker. i have legs that can climb and do things that most can not do and am 210 pounds . just lost 50 pounds . I was running a 44/52 road crank on my steel full suspension KHS with double triple RST on it. yet i could still ride with the fellas and gals and always passed them all on the ride home on the roads be it down hill or up. gear ratios are specific to the person pedaling. just because some tall guy says a 180mm crank is better for him does not mean it is good for another tall guy or gal. and microdrive drove me insane in the early to mid 90’s
Bruh, you got tweakers messaging people as you, I got 2 different ones..
Great video ! Ps .. what you’re wearing are called (flip flops🩴) not sandals 👌😀
Phu, that is circumference. The circular measurement of the circle.
Diameter is the distance if the two farthest distance of a circle when cut into half.
44×16 baby!
I have a 26" Kink Drifter stock is a 25T/10T, should I change my gearing?
Circumference is the distance around the outside perimeter. Diameter is out- side to outside, through the axle. Radius being half of the diameter or outside to axle
I have a 20" BMX bike and run 30/9
Sweet vid! That end bit with the small wheels on the 29 was funny af