The Street > The Bike Shop
Euro/Interbike 2015
weedbix:
--- Quote from: Spev on September 23, 2015, 07:56:37 PM ---
--- Quote from: Professor Horatio Hufnagel on September 21, 2015, 01:43:09 AM ---T least you'll be able to run everyone's cranks. And buy bearings off the shelf for some of them
--- End quote ---
Technically speaking you still won't be able to get off the shelf bearings for 22mm mid. They are generally only common now in the bike industry. That was the whole benefit of Spanish BB's, the 37mm outer diameter was available off the shelf in many inner diameter options to suit the numerous spindle diameters of the day (excluding 15/16" as it wasn't around).
--- End quote ---
22mm Mid is custom yes, 3/4" isn't (R12). Compared to Spanish, where you could only get off the shelf bearings for 20mm Torker cranks. Being able to get off the shelf for 3/4" (Profile and 999 others) is more useful than running Torker cranks, don't you think?
Edit: Sorry didn't realise it had been mentioned
weedbix:
As for buying off the shelf, I don't know why more people don't do it. There's more places in a city selling bearings off the shelf than there are bike shops in that city, and they are cheaper
dude...:
cos 19mm spindle cranks are in the minority these days. so typical of bmx to base the standard around one size, then almost completely abandon it in favour of a different size (22mm) and then come up with another different spindle size requiring another custom sized bearing (24mm). should have used the 22mm primo usa bb sized bearings for mid, not frickin profiles
weedbix:
I was happy when cups meant bearing outer diam wasn't locked in
G:
--- Quote from: Sasper on September 24, 2015, 06:54:50 PM ---
--- Quote from: G on September 24, 2015, 03:34:36 PM ---
--- Quote from: Spev on September 23, 2015, 07:56:37 PM ---
--- Quote from: Professor Horatio Hufnagel on September 21, 2015, 01:43:09 AM ---T least you'll be able to run everyone's cranks. And buy bearings off the shelf for some of them
--- End quote ---
Technically speaking you still won't be able to get off the shelf bearings for 22mm mid. They are generally only common now in the bike industry. That was the whole benefit of Spanish BB's, the 37mm outer diameter was available off the shelf in many inner diameter options to suit the numerous spindle diameters of the day (excluding 15/16" as it wasn't around).
--- End quote ---
However, Spanish was always just that bit too small.
:)
G.
--- End quote ---
why? are they really too weak? never had a problem with mine I think (when I used to run it) , saves a considerable amount of weight , with bearings and bb being smaller.
--- End quote ---
Yes. On a 22mm crank it was just too thin. Sure some people were "fine" with a Spanish BB on 22mm but a good proportion DID break... never seen a Mid BB bearing broken in the same way...
Quantify "considerable amount of weight"... Was probably a maximum of about 50g, which seems a very small penalty to go from frequent failure to zero...
:)
G.
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