Help choosing frame

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10/5/2020 5:14 PM

This is my first time on vital so I'm not sure if this is the place for the question but I'm looking to build my first bmx. I ride moto and mtb and there aren't many parks and good places to ride streat nearby. So I decided to start building some dirt jumps in my backyard, (I have about 1.5 acres of space to work with). I wanted to build up a nice trails oriented bike. The frames I was looking at were The S&M black magic 21.5 top tube and C.C.R 22.5 top tube. I am about 5'11 and 3/4 in tall but have pretty long legs so I wanted a roomier frame. Any suggestins and advice would be much appreciated, thanks in advance.

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10/5/2020 5:50 PM

If you’re primarily riding trails and used to bigger bikes 21.5 would probably be good. 22.5 maybe a bit of a stretch but could work depending on your preference. I’m 5’8 and ride a 20.75 but don’t ride trails, just park and street. 1.5 acres is more than enoough. I’d suggest 21-22 top tube 13.75-14ish cs and 74-74.5 ht angle based on height/trail riding

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10/5/2020 5:55 PM

cky199 wrote:

If you’re primarily riding trails and used to bigger bikes 21.5 would probably be good. 22.5 maybe a bit of a stretch but ...more

Oh woops I meant 21.25 but thanks for the response. Im not planning on learning any crazy tricks in the near future.

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10/5/2020 6:09 PM

Also any other parts or frame suggestions will be appreciated.

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10/5/2020 7:34 PM

Ccr seems like a good place to start. Other parts are kind of personal preference, but you won’t know what you like until you’ve tried a few. I’d suggest going for middle of the road stuff, ie 9” bars and an average rise topload stem, 2.25”ish tyres, 32mm offset forks etc.
Hubs will depend on wether you like a loud buzz or not. 4 pawl is quick enough engagement for trails, like profile mini’s. 175mm cranks are a good place to start too, they were industry standard until a few years ago, but you can ride trails with shorter cranks (Clint Reynolds uses 170mm iirc). And 28-9 gearing

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10/5/2020 10:35 PM

I’m 5’11” and have a 21.25 frame that I rode for a little bit, Too long for street for me but it feels good on trails. Nice and stable. I’d recommend 21 or 21.25, 21.5 seems a bit big unless you’re taller or on some real crazy isht.

I’m sure either one of those would work for you. I have a 30-9 ratio on my trails bike, but have also ridden 28-9 on trails. Both work good, if you don’t think you’d be going too fast the latter should be all you need.

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Pegless and coaster is ultimate zen

10/5/2020 10:49 PM

I’m just about the same as you, Dan. 5-11 here also. All my frames are/ have been 21 except my race frame which is 21.25. The race frame is comfortable on the dirt, but would be just a little long for anything else.

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10/6/2020 4:26 AM

Parts Wise - Stick with Demolition, Odyssey, Shadow Conspiracy. They wont let you down.

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Husky Nation Member

10/6/2020 4:40 AM

Ok sweet thanks for all the advice, would a 21.25 big to big for occasional park visits?

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10/6/2020 7:02 AM

gcdm327 wrote:

Ok sweet thanks for all the advice, would a 21.25 big to big for occasional park visits?

It’ll be fine. You’ll get used to it, and it’ll be great for boosting

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10/6/2020 7:38 AM

gcdm327 wrote:

Ok sweet thanks for all the advice, would a 21.25 big to big for occasional park visits?

.pegless. wrote:

It’ll be fine. You’ll get used to it, and it’ll be great for boosting

Ok thanks for the help.

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10/6/2020 7:39 AM

Are 22' in wheels and good for trails?

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10/6/2020 7:42 PM

gcdm327 wrote:

Are 22' in wheels and good for trails?

Never ridden one myself, but I’ve got a trails riding buddy who rides 22” and says he couldn’t go back to 20”. He is 6’4” though

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