2 or 3 Blades on MtB?

[Marius]

StringBean, what's best, the ISIS or Sqr Taper? I have NO idea what they on about?smileys/smiley9.gif Do you by chance know how much this crank would weigh?

[Marius]

I see if you have picked the sqr taper option you need to selcet at no5 the bolts, weird, so what's up this that??

[GoLefty!!]

Dick,

a 2x9 set is wonderful if you use a 12-34 casette at the rear but the gearing is still not as low as with a 22x32 granny. If you can't climb in 22x 28 then forget it. 

The chainline is improved and you save a few grams.

However the trick is to get the two click, 3 chainring front shifter to work reliably with a double ring set up. I overcame this by using a SRAM Gripshift for the front. It also allows trimming of the front derailleur.

 

Middleburn and FRM make 2x9 compatible chainrings. I still have a Cannondale Coda CX2 chainset laying in my spare parts bin if you'd like to try a 2x9 before commiting to buy

Gearing charts

	29	44
12	61.93	93.97
14	53.08	80.54
16	46.45	70.47
18	41.29	62.64
20	37.16	56.38
22	33.78	51.25
26	28.58	43.37
30	24.77	37.59
34	21.86	33.16

 

	22	32	44
12	46.98	68.34	93.97
13	43.37	63.08	86.74
14	40.27	58.58	80.54
16	35.24	51.25	70.47
18	31.32	45.56	62.64
20	28.19	41.00	56.38
24	23.49	34.17	46.98
28	20.14	29.29	40.27
32	17.62	25.63	35.24

[Marius]

Hi, can some 1 tell we what I need or rather what is ISIS and Octalink...

I want this crank thingy...

uploads/Marius/images/2006-07-11_160522_fsa_isis.jpg

but want to know if I need the Isis or Octa??

uploads/Marius/images/2006-07-11_160551_fsa_price.jpg

[GoLefty!!]

ISIS is International Spline Interface Standard or a anti Shimano type of splined BB. Unfortunately they're not very reliable in a MTB application. Full compliment bearings can do that...

 

Octalink is Shimano's uperior splined interface between crank and BB