The Fastest Crank Size For BMX Racing

Рет қаралды 9,522

2 ай бұрын

We take a set of 170mm & 180mm Promax cranks and pit them head to head to see what's the fastest crank length for BMX Racing!
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Пікірлер: 39

@jermainedow1481 Ай бұрын

For myself older with knee issues ive noticed shorter cranks are better on my joints. Less strain on the knee. 6'1 270lbs ifbb pro who doesn’t compete anymore and 170s feel great.

@FullTiltBikeCo Ай бұрын

Yes and that's the biggest thing, finding something that works for you and is comfortable! That will always be faster than whatever is the latest hot trend in the sport! Always go with what fits you best and seems you found just that!

@gertmzazi7701 Ай бұрын

Used to race in the mid eighties, one crankarm 187.5mm the other 185mm just to be faster out the gate and to get thru the deep mud

@matjohnson285 Ай бұрын

Fun to watch. Glad for the replay slow to watch your box starts.

@FullTiltBikeCo Ай бұрын

Thanks for watching!

@DRMDiscs Ай бұрын

When i started racing i went with 170 mm cranks. I had gone in for a fit on my road bike and they said 170 was correct for my leg length. I bought my chase element and it came with 180 mm cranks. I have since changed to 170 mm and my hips don't hurt like they used to with the 180s.

@StankFernatra Ай бұрын

Smart. I'll contribute that, as someone who's in his mid-forties and perhaps fast on a bike, I'm more interested in having a great time for another three decades on bikes: Avoiding joint injury is worth any number of compromises. "My body is my home."

@mikeyseibert1406 22 күн бұрын

How tall are you?

@eldavis4608 2 ай бұрын

Good shit!

@sherardg2836 2 ай бұрын

Race, you were smoother on the 170mm. Less bounce on the rollers, perhaps less dead spots, more efficiency . Jonnie, smooth as heck on both.

@GrantHansen Ай бұрын

Great video, thanks! I'm 5'10" and currently thinking of going from 180mm down to 175mm, which based on your discussion seems like the sweet spot. I'd love your perspective on how a rider's height and bike size factor into length?

@FullTiltBikeCo Ай бұрын

Man we could talk for HOURS on this topic. But really it's more of a visual thing for us. We look at how the rider's hips move throughout the pedal stroke and make small adjustments from there. Best bet is to see a professional or come stop by the shop if we're at a nearby national and get some advice in person!

@billteager3618 Ай бұрын

What is the roller setup?

@shafiqjan1474 2 ай бұрын

177.5 to 180mm was my sweet spot for racing with my legs. Longer cranks were always a benefit in BMX, on road & with MTBs out here on the NE coast

@FullTiltBikeCo Ай бұрын

Yes, Race was always a fan of the 177.5s seems having that extra leverage and nailing the start is what BMX is all about!

@markscott2232 Ай бұрын

What are you using for timer?

@FullTiltBikeCo Ай бұрын

These are the browers black box timing system. Usually works really great! The batteries were just running low during our session so that caused a few miss reads.

@zac.bolin01 Ай бұрын

I’m on 165 right now I’m not sure if I wanna go up or not Might go up to 170 or 175

@marlonmendes1954 2 ай бұрын

🔥👍

@gotmoto 2 ай бұрын

Fun vid. Am I the only one who noticed it was 32 mph not 31?

@FullTiltBikeCo Ай бұрын

No you're right, it was 32mph. We just put the 31mph in there to clarify what we thought was a 37

@chriss2928 Ай бұрын

can you " spin- turn circles" that easy with Flats on ..

@FullTiltBikeCo Ай бұрын

Like on the rollers or off the box? Definitely easier to spin with clips on, but still very possible to turn tight circles with flats as well. Just have to be pretty dialed in with technique!

@chrispatterson8572 Ай бұрын

So both right on 54 gear-inch on a 1.75 tire?

@FullTiltBikeCo Ай бұрын

Yes, both bikes on 1.75 tires and close to 54 gear inch rollout. Black bike was a 54.2 w 180s and the purple bike was 53.9 with 170s. When you factor the crank lengths into the rollout they come out nearly identical.

@pisstoffcat5136 Ай бұрын

Ok , now try some 185mm . I had a wheelie bike with 185mm and a 46-16 , I don't know about the rest of it but was smoother to me when doing wheelies and I'm not tall , so I think more testing is required.

@FullTiltBikeCo Ай бұрын

Would be interesting to look into! But one thing we can't forget about is the potential of striking longer cranks on the ground when coming out of turns or pedal manuals. I've never seen anyone race on a set of 185 but we might have to be the first to try hahaha

@jmhagle 2 ай бұрын

I said JEEE-zus! at the exact same time when he hit 35mph! haha

@FullTiltBikeCo Ай бұрын

Hahahaha, check out this at home workout Jonnie posted as it should help everyone gain a few extra mph on their sprints 😉 kzfaq.info/get/bejne/aLKnpbiG1tTSpIk.htmlsi=V_tBP5pB8ukb_jZD

@sandy_knight 2 ай бұрын

One advantage of shorter cranks that a lot of people miss is that having your feet closer together gives you more pump because your legs have more travel to work with. Or put another way, try jumping in the air with your feet together and apart, you'll get higher with your feet together.

@user-pq6ui3cc1k Ай бұрын

The race is normally over before the 30foot mark. max power maters more than what your talking about.

@sandy_knight Ай бұрын

@@user-pq6ui3cc1k That's fair enough, a small advantage over the rest of the track might not out-weigh the reduced power out of the gate. Would you say as long as you can keep power through the drive train until the bottom of the start ramp the longer the better? Its probably worth doing some real world starts, on a start ramp with gravity assist, to nail down the best length.

@FullTiltBikeCo Ай бұрын

Personally, we think it's a mix of both elements! You want a set up that makes you feel comfortable/confident around the track. But it also needs to be effective out of the gate. When it really comes down to it, we think it's best to prioritize your bike set-up around effective gate starts over track comfort. As it's great to be fast around the track, but there's only so much you can do from the back of the pack. Seems the best bet is to nail the start and hope for the best around the track hahaha