[dualsport650]

My Sub-22 pound full-suspension build project is moving right along. I'm buying all components first, then frame/fork. Probably Titus Racer-X.

My next step is purchasing the drivetrain components (Derailleurs, Cassette, Chain)

From this forum posting, I hear that going with road components like the Dura-Ace 12-27 cassette and derailleurs is the way to go...

http://forums.mtbr.com/showthread.php?t=60677
"One of the best ways I have found to loose weight on a mt. bike is to swap the mt. cassette for an Ultegra or Dura-Ace 12-27. Along with this you will need a compact drive up front. This reduction of chainring and cassette material results in some major weight loss of around 150-175 grams."

So, here's my spec list. Let me know if you have better ideas...

CURRENT COMPONENT | SPECED COMPONENT | WEIGHT SAVINGS:

Cassette
XT 270+ gr | 12-27 Dura-Ace (CS-7700) 180 gr | -90 gr

Rear Deraileur
XTR 952 short 211 gr | Dura-Ace 7800 10speed 185 gr | -26 gr

Front Deraileur
LX 145 gr | DA 7700 + adapter clamp 86g | -59 gr
[NOTE: I'm not going to buy the front derailleur until I buy my new frame.)

Chain
SRAM PC48 292 gr | KMC X-10 SL 240 gr | -52 gr

TOTAL WEIGHT SAVINGS: -227 grams! That's 1/2 a pound folks!

[Tune the Derailleurs with AL bolts and knock off another 30 grams!]

I already have a crankset. Last month I bought a NIB (new in box) Race Face Next LP crankset:
* Compact 94/58MM
* Square Taper
* 44/32/20 rings
* Aluminum SRP bolts
* All Aluminum rings (Yes, granny is al too!)
* NICE!

I want to go with 9 SPEED, NOT 10 Speed.

Let me know if this all sounds good, or if you have other better suggestions.

Also, where do I buy the KMC X-10 SL Chain???

Thanks!

 

[DIRT BOY]

I now carry the chains from KMC

X9 SL and X10 SL.

 

[Duckman]

Good choice in cranks/BB style.

With the roadie cassette, throw away the 14t cog, then add an 11t from your XT. You'll need an 11t compatable aluminum lockring from Cambria($4 last year) or just use you old steel XT for now. Now you'll have 11t, 12t, 13t, 15t, 17t and so on....This mod will give back a small chuck of the overlap lost(from going to a road cassette) between front chainrings gear ranges. Altho it affects all 3 rings, most importantly you've otherwise shortened your middlerings useful speed/power range from both ends(12t/27t).

 

[dualsport650]

Note to self: Buy X10 SL (and Syntace F99 Stem) from Dirt Boy

Yeah Duckman,

I'm old school and want NOTHING to do with that ISIS or Outboard bearing crap.

I'll be buying the Action Tec bottom bracket too! Good stuff.

Thanks for the gearing tips. I'll do it.

 

[Rutnick]

don't let axe here you say that. He's going ape over the fact that people still use square.

 

[Cloxxki]

I think you're spending a fortune for just a couple grams. Next to the grams you save, note what you spent per gram. You may well find other places to save more weight with the same money. If you;re not on a budget, hey, enjoy the game!

 

[dualsport650]

Hey Cloxxki,

I gotta buy all this stuff anyway, as my old parts are now on my "wife's bike" (which I ride a lot!)

Wife's Bike - Built with Old Parts - Frame and Fork cost $220...

So for me I'm building a full-suspension bike from scratch and want it to be around 22 pounds. This will be a little tough as I'm going to buy a Titus Racer-X (which isn't super-light) and put disc brakes and a sturdy fork on it to make it light AND STRONG. In other words, I have to save weight everywhere I can and the drivetrain is a good place to save an extra 200-250 grams.

Most of this stuff can be bought cheaper on eBay...

 

[WesternMD]

Take her fork!!!

What are your considering for a fork? It will be hard to beat the one on the K2.
I am certain others will agree.

 

[dualsport650]

I hear that.

I'll probably get a Noleen for my ride as well!

 

[Axe]

don't let axe here you say that. He's going ape over the fact that people still use square.

You are rude and you are misinterpreting completely what I have said. I was discussing with you presuming that you have an honest opinion, but now I think you are just rude and dumb. Have a nice day.