Author Topic: BOTTOM BRACKET HELP IT'S NOT EURO OR AMERICAN! (Read 2118 times)

winnit93 · « **on:** January 30, 2008, 12:35 PM »

ive just got the titan mini frame through from steve first thing i need to sort out is this weird bb size.
the hole on the frame is 38mm with cups that would take bearings 34mm.
this is a new one on me so can anyone shed any light on it and point me in the right direction

oberonspacefruit · « **Reply #1 on:** January 30, 2008, 12:40 PM »

spanish?

american bb without the cups?

winnit93 · « **Reply #2 on:** January 30, 2008, 12:49 PM »

looks to small to be american without cups.

spanish could be right though

winnit93 · « **Reply #3 on:** January 30, 2008, 12:54 PM »

did spanish bb exist in 1982?

BrianP · « **Reply #4 on:** January 30, 2008, 01:12 PM »

any help? dims listed are relating to the bearings.

Bp

oberonspacefruit · « **Reply #5 on:** January 30, 2008, 01:15 PM »

i think spanish are the last 10 years invention.

pickle · « **Reply #6 on:** January 30, 2008, 01:31 PM »

Brian.....i think that's my BB

i thought all mini's were euro sized BB?

HEYWOOD BMX · « **Reply #7 on:** January 30, 2008, 01:35 PM »

Don`t Euro B/B`s come in different sizes/threads?

winnit93 · « **Reply #8 on:** January 30, 2008, 01:37 PM »

the actual hole on this frame is 38mm,the outside diameter of the bearing is 34mm

these were very special and very expensive frames,made of titanium and arc welded under water

dont think titanium was used on any other bmx bikes then.

even the headset's are different bloody 7/8 on these

dibly · « **Reply #9 on:** January 30, 2008, 01:44 PM »

the inside diameter of a euro BB shell is 34mm but the bearing will be smaller than that depending on what size cups you use

Moose · « **Reply #10 on:** January 30, 2008, 02:16 PM »

Do you have the cups still? If you do, what is the OD of the cup?

winnit93 · « **Reply #11 on:** January 30, 2008, 02:22 PM »

Quote from: Moose on January 30, 2008, 02:16 PM

Do you have the cups still? If you do, what is the OD of the cup?

yes mate i have the cups o/a size is 39mm on the back of the cup

Moose · « **Reply #12 on:** January 30, 2008, 02:30 PM »

Quote from: winnet93 on January 30, 2008, 02:22 PM

Quote from: Moose on January 30, 2008, 02:16 PM
Do you have the cups still? If you do, what is the OD of the cup?

yes mate i have the cups o/a size is 39mm on the back of the cup

Are the cups threaded?

winnit93 · « **Reply #13 on:** January 30, 2008, 02:32 PM »

Moose · « **Reply #14 on:** January 30, 2008, 02:40 PM »

I have no idea either then.

Those cups should take normal euro sized bearings, but I have no idea what the cups are ?

$:-\$

Moose · « **Reply #15 on:** January 30, 2008, 02:59 PM »

Really quite odd, but I guess custom made for Titan jr's?

http://bmxmuseum.com/bikes/titan/1858

BrianP · « **Reply #16 on:** January 30, 2008, 03:06 PM »

Quote from: pickle on January 30, 2008, 01:31 PM

Brian.....i think that's my BB

lol, sure is bud!

Quote from: Oberonspacefruit on January 30, 2008, 01:15 PM

i think spanish are the last 10 years invention.

yeah they were developed by Fly Bikes, hence the "spanish" bit, but i'm sure there have been quite a few different variants out there at some stage.

Quote from: Moose on January 30, 2008, 02:40 PM

I have no idea either then.

Those cups should take normal euro sized bearings, but I have no idea what the cups are ? $:-\$

Hey if the cups aren't threaded, isn't there another setup which is kinda like the profile evolution BB that actually threaded into itself from each side?

IASC or something???

Google time, I reckon...

Brian

kdw712 · « **Reply #17 on:** January 30, 2008, 03:18 PM »

Have a look on sheldonbrown.com

tons of info there

def a weird size BB $:-\$

stidds · « **Reply #18 on:** January 30, 2008, 03:25 PM »

Have a search for 'Threadless Bottom Bracket', that is the kind that threads to itself. I know YST do one but I am unsure of the sizes.

winnit93 · « **Reply #19 on:** January 30, 2008, 03:38 PM »

this is a 1985 model but even this looks smaller than the one i have

this is mine

Moose · « **Reply #20 on:** January 30, 2008, 04:00 PM »

I saw that one as well and assumed the other was the same size - but as you've shown, it's not.

I definately have no clue and Sheldon Brown's website can't help either $:-\$

winnit93 · « **Reply #21 on:** January 30, 2008, 04:02 PM »

im gonna pop round to keswick mountain bikes see if they know what the fook it is

MartyC · « **Reply #22 on:** January 30, 2008, 05:47 PM »

Pop down to a bearing shop and see if they can get a match for you

winnit93 · « **Reply #23 on:** January 30, 2008, 07:36 PM »

Quote from: MartyC on January 30, 2008, 05:47 PM

Pop down to a bearing shop and see if they can get a match for you

ye thats the next step ive a ti spindle coming so i can get a bearing to fit

MartyC · « **Reply #24 on:** January 30, 2008, 07:48 PM »

Quote from: winnet93 on January 30, 2008, 07:36 PM

Quote from: MartyC on January 30, 2008, 05:47 PM
Pop down to a bearing shop and see if they can get a match for you

ye thats the next step ive a ti spindle coming so i can get a bearing to fit

Steve is selling the BB that came with it in the For Sale section "half price to the buyer of the Titan" or words to that effect