echo8 Posted December 18, 2006 Report Share Posted December 18, 2006 just wondered what people thought isis or square taper which is best Quote Link to comment Share on other sites More sharing options...
eskimo Posted December 18, 2006 Report Share Posted December 18, 2006 Most people would say i isis. I would say isis.You never asked why though which would be better to ask. Then you could make up your own mind.You will find enough answers using search. Quote Link to comment Share on other sites More sharing options...
echo8 Posted December 18, 2006 Author Report Share Posted December 18, 2006 i think isis is better but square taper is alot cheaper so i just wondered what people thought Quote Link to comment Share on other sites More sharing options...
Dan6061 Posted December 18, 2006 Report Share Posted December 18, 2006 Square taper BB's bearings last longer.But the tapers can round off easily.ISIS bearings can be weaker.But they can't round off. Quote Link to comment Share on other sites More sharing options...
ogre Posted December 18, 2006 Report Share Posted December 18, 2006 isis bearings go to shit, unless you get an echo external/skf but the axles are shitloads stronger that square taper Quote Link to comment Share on other sites More sharing options...
c.kezer Posted December 18, 2006 Report Share Posted December 18, 2006 get isis i think that there a lot stronger that square taper and the bottom brackets seem to be stronger to. chris Quote Link to comment Share on other sites More sharing options...
moza Posted December 18, 2006 Report Share Posted December 18, 2006 Hi,My mate has snapped about 4 square taper bb's in the space of around 3 months but dont worry he is about 6.5". i run square taper at the moment but i am just switching to isis, i would say go for isis if you have the money and like dan says they can also round of. I would rather have weak bearings knowing my cranks will not strip.Moza Quote Link to comment Share on other sites More sharing options...
Broomer Posted December 18, 2006 Report Share Posted December 18, 2006 (edited) you will be fine if you use a decent set of cranks such as middleburns, racefaces etc on a swuare tapered bottom bracket. Edited December 18, 2006 by Broomer Quote Link to comment Share on other sites More sharing options...
echo8 Posted December 18, 2006 Author Report Share Posted December 18, 2006 i was thimkin abot gettin a Echo ISIS, External bb of my mate for £30 Quote Link to comment Share on other sites More sharing options...
moza Posted December 18, 2006 Report Share Posted December 18, 2006 as long as you dont run front freewheel you will be fine. Moza Quote Link to comment Share on other sites More sharing options...
mrturner08 Posted December 18, 2006 Report Share Posted December 18, 2006 Square taper BB's bearings last longer.But the tapers can round off easily.ISIS bearings can be weaker.But they can't round off.this lad knows it all!!!pAuL! Quote Link to comment Share on other sites More sharing options...
nmt_oli Posted December 18, 2006 Report Share Posted December 18, 2006 Please use the search, this will be the 3rd thread ive posted this in.The ISIS interface is inherently stiffer, and allows for the use of a larger diameter axle to increase strength. Unfortunately however, the larger axle means there is less room for bearings, so in most situations the load capacity of the BBs are reduced, or they don't last as long, or both. Various methods have been devised to prevent this, such as the external bearing BBs, although the mentioned SKFs seem the best on the market at the moment.You are right about the actual taper causing problems over time. Square taper cranks work on a fully tapered interface, you can just keep going if the crank becomes slightly loose, wheres the ISIS taper has a much shallower angle, and actually has a stop, so unlike square tapers which you can keep forcing when the taper wears a little, the isis cranks push on and stop at a set point. If any play develops, which it can after a lot of use (accelerated by multiple removal of cranks) then there is no way of getting rid of it, the taper is permanently damaged. I've seen this happen to a few cranks, including middleburns. you undo the crank bolt and you can just slide the crank off, no need for an extractor.Square has been around almost forever, and i think it will have its place for a long time to come yet, its simple, cheap, universally known and easy to maintain.ISIS is a great solution for the more extreme ends of biking nowadays, which inherently have shorter lifespans on high stress parts such as cranks any way, so you may be able to justify the reduced longevity for the extra strength.ISIS are more expensive as the Tapers profile is harder to manufacture, it is a more complicated shape and has to be made to a higher tolerance than square taper cranks. Quote Link to comment Share on other sites More sharing options...
flas12345 Posted December 19, 2006 Report Share Posted December 19, 2006 aup pal,i would say that isis are better bottom brackets because it is a very unlikly chance that they will round off where as square taper i have known some of these round off on some peoples bikes. so ye isis mate Quote Link to comment Share on other sites More sharing options...
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