Which BB for Profile Racing cranks?

[rentedmule]

After an oddly stressful deliberation over which cranks to run on my Dekerf Implant, I decided to go with the Profiles pictured. The plan is to clean/polish them and run 2 rings and a bash guard, not the setup shown (I copied the pictures from the seller's ad on Pinkbike).

Profile cranks by Rented Mule, on Flickr

Profile 2 by Rented Mule, on Flickr

I need help figuring out which bottom bracket I need. The frame has a standard old threaded BB mount, either 68 or 73 mm (I can't remember off the top of my head). Is it this one? https://www.profileracing.com/product/bsa30-outboard-bottom-bracket/

Gratuitous picture of the bike with old Truvativ Stylos I had on hand to get it moving.

20240822_081239 by Rented Mule, on Flickr

 

[NigelFinnighan]

I believe either the BSA or Euro BB would work- I'd contact Profile Racing and ask them what you'd need. They're helpful, I've contacted them before. Those look the same crank as a BMX with a double/triple spider on it. Reach out to them, I'm sure they'll get you set.

 

[d8mok]

Didn’t realise that Profile made mtb bottom brackets.

I’ve a pair on a spooky. Running bmx bb. Extremely heavy set up.

 

[wesmamyke]

Euro BB is just the BMX term for a standard english threaded BB. Just make sure you get the correct axle size. Probably 19mm, but they did 22mm oversized too. The axles come in a bunch of different lengths as well, I think it's generally the longest one they offer for a MTB.

 

[rentedmule]

Thanks for the info! I'll measure the spindle size when they arrive and confirm with Profile on the BB spec. Back in the day, some of the hardcore freeride guys at the shop I frequented ran Profiles with 2 rings and a bash, so I knew it was an option. Profile still sells the spider for that setup.

I know they're going to be heavy, I run a similar SINZ setup on my BMX. The rest of the Dekerf is fairly lightweight, so I think I'll be able to tolerate them. If I'm honest, I'll probably spend more time admiring it in my shop than I will riding it anyway

 

[Mace4130]

Thanks for the info! I'll measure the spindle size when they arrive and confirm with Profile on the BB spec. Back in the day, some of the hardcore freeride guys at the shop I frequented ran Profiles with 2 rings and a bash, so I knew it was an option. Profile still sells the spider for that setup.

I know they're going to be heavy, I run a similar SINZ setup on my BMX. The rest of the Dekerf is fairly lightweight, so I think I'll be able to tolerate them. If I'm honest, I'll probably spend more time admiring it in my shop than I will riding it anyway

You will need a Euro bottom bracket, and a Profile Mtb axle, the standard length bmx axle will be to short, you won’t have enough clearance between the crank arms and the stays.
Your franks look like the regular 19mm axle version, not the SS 22mm version.