[DukeNeverwinter]

Current weight is 24lbs, 2oz

Build
Frame: 19.5 sf100 2011 with all the rubber armor
fork: fox f120 15qr travel reduced to about 105mm. 1771grams/ 15qr 71grams
Crank: xt m770 22xt/36slx chainrings
cassette: xg-999 175ish grams
pedals: Crank bros 2ti wite Wade Ti spindles 178ish grams
seatpost: thomspon Masterpiece 31.6 350mm. 189grams
seat: Selle smp GLider. 265 grams. Heavy by WW, but oh so comfy
clamp: stock bontrager, unweighed
stem: Bontrager RXL 105: 123grams
Bar: CrankBros cobalt riser unweighed, should be near claimed though.
Grops, Bontrager foam, unweighed
Shifters: sram x0 grips, 180ish total
Rear deraulleur: sram mid cage x0, unweighed
front deraulleur: xt high direct mount 150ish I think
Front wheel: Stan's arch, Dt-revo's, Chub hub. 804grams, hub weight 165grams.
Rear wheel: Bontrager RXL 915ish grams plus 50grams for the rimstrip
Front tire: Schwalbe ROcket Ron, about 580ish I think....
rear tire: MAxxis Aspen exo 575
Brake: Formula r1
Front rotor: 180mm r1
rear rotor: 160mm XTR centerlock,

Ok, so here is the ideas.
I am 99% sure I am going to buy a Next SL crankset, this should net about 180ish grams.

I am going to replace the rear wheel with minimum a Stan's Notubes arch/ztr hub this should get me another 50ish grams. The bontrager freehub is having issues. Going to this wheel will also let me use my 160mm r1 rotor another 30-40 grams saving over the XTR rotor. When I replace the rear wheel I will also be getting ti rotor bols for grins.

NOW, what else could I do?

I am thinking about AM classic hubs with Crests for raceday only. possibly another 150ish grams

I am also thinking about selling the thompson and getting a KCNC post or A CrankBros Cobalt or a Bontrager xxxLite seatpost. Any of these will net me anout 40-50 grams.

Tire options. I like real tires. Rocket Ron's and the Aspe's are about as light as I safely want to go. Maybe just for grins, If I buy the Crests I'll put some of the Bontrager 29-3 2.0's on the bike. These tires weigh about 445ish each and have great traction.

Saddle, I like the Glider. Any ideas on something with a similar shape but lighter? Need to try a SLR and see if it will work for my a$$. If it does even more savings.

Fork: Got a f120 from my previous bike. I know its heavier than an f100 but I think I'll keep it. If I really wanted to I would by the tapered steerer (lighter,rumored), plus I would ditch the heavy 1.5-1.25in adapter. And no way am I going away from 15qr, made such a big difference on my old 29er

So, without going to WW tires these changes should get me to just abour 23lbs.

Comments?

 

[indyfab25]

Lose the front derailluer/shifter/chainrings. Go 1x9.
American Classic front hub with Crest rim.
Enve flat bar?

 

[DukeNeverwinter]

Not so sure about the ENVE bar or STEM. The cobalt 11 bar should be about the same weight or lighter. want to keep it geared, sorry. need to source another front 2x9/10 derraileur though.

 

[Fishlips]

Enve XC wheelset with DT 190 hubs, 1337 grams (http://www.envecomposites.com/wheels/mtb/twenty9XC.aspx) .

That saves you about 400 grams. Of course that wheelset is probably over $2,000.

Add a Lefty fork and you could be close to 22 lbs.

 

[DukeNeverwinter]

Was going to buy some Specilized Roval SL's but they arn't in stock ANYWHERE. plus way cheaper than Enve.

 

[xcbarny]

Did you factor in the weight saving from not having to use rim strips with the stans rims?

You could run a road front deraileur with an adaptor. You'd need to search the weight weenie forum for details on this, but I think you could save 60g.

 

[1-bar]

I can vouch for the Crank Brothers Cobalt 11 weights. I have the 600mm flat bar and the 30.9 x350 seatpost. Both were within +/- 2gms of the specified weight. I think the bar was 137gms which was the claimed weight. I would also look at the KCNC rotors. The 160mm rotors are 73gms each and are only $25 a rotor. Also what is your weight and riding style. That should really dictate the lightest wheelset you should consider. Instead of the Race Face crank, you should also consider the a modified Truvativ Noir. I changed the Noir to a 36/22 combo with truvativ rings and it weighed 724gms with BB. I know that a little heavier than the RaceFace but it's also hundreds of $$ less. BTW, I have my Tallboy at 23.12lbs and as I understand it a Superfly frame is about 1/4lb lighter.

 

[DukeNeverwinter]

@xcbarny: Not sure on what I am going to do about the front Derailleur. They want $100 just for the adapter...wish somebody had accurate weights for the XTR 2x and x0 2x front derailleurs.

@1-bar: Are the KCNC rotors the same as the alligator ones? I had the windcutters on my previous bike, but bought the r1 rotors when I got the brakes. the r1 160mm was about 85g i think. when they need replaceing I'll look at the windcutters or KCNC.

I am 200lbs. I know that is over the limit for the crests. BUT, this would be a race/event wheelset mainly. some prerides but normal trail riding will be my current wheels. I only have one set of wheels and really really like to have two, just incase. That is why I am looking at Crests or anyother wheelset in general. edit: I don't jump, I have learned to pick my lines pretty good from riding a rigid singlespeed. I believe myself to be easy on wheels. never really had one come out of true from me riding it. Plus, the race courses in SoCal really don;t have much Gnar Gnar.

 

[flyag1]

Go lefty!

 

[Varaxis]

Project, get you back on your rigid SS cause that Superfly 100 isn't going to be much faster by losing a couple pounds.

 

[jms]

Wheels

Was going to buy some Specilized Roval SL's but they arn't in stock ANYWHERE. plus way cheaper than Enve.

Nor as light. Nor as strong. My Edge XC/DT 190's are over two plus years old with well over a thousand of miles on them. Weight is @ 1400 grams for the pair.

Are you going to weigh the bike or ride it? Wheels are your best performance investment.

 

[DukeNeverwinter]

@Varaxis: pfft, Weighteenie-ism is a disease. You sir, make too much sense. there is no logic in this thread....

@jms: the Roval SL's are supposed to be around 1450 total. That's very clsoe to your edge's. There isn;t enough feedback for any kind of comparison yet. Trust me, I am considering the edge/enve's with dt-240s. no stock until march though.

No stock seems to be my current roadblock with this fun. Wheels=no stock, even with the Notubes Crests with AMclassic hubs. Cranks (next sl)=No stock (raceface direct).

 

[Varaxis]

This is how my SF100 turned out... weight doesn't seem to be very high on my list. Might seem like a shame to some folks, but it's a lot more fun as a trail bike and it turns into race mode with a change of tires, pedals, and post.

 

[flyag1]

Lefty will save over 1 lb... when you ditch the 15mm axle

 

[DukeNeverwinter]

Varixis: very cool! how much Gnar do you do with it? I am curious if I should be worried about jumping.

 

[CactusJackSlade]

Lefty will save over 1 lb... when you ditch the 15mm axle

What he said :thumbsup:

 

[Varaxis]

Yea, you should be worried about jumping. There's no telling what the limits of a CF product is until you actually break it. That said, 6' is the limit of my comfort range and it's been good so far for that level. I keep in mind that this is a *lightweight* CF bike, as opposed to one with much more material such as the Tallboy, Nomad, or whatever. Anyone can make something lightweight by removing material, but I don't know of any tricks that they did to make it stronger than something else made of the same material, hence why I'm not a weight weenie. I like to play hard. I actually wanted a Rumblefish, but couldn't resist the deal on this.

I've taken it through the Fontana's various DH tracks and it's still sound. Fontana has the rockiest trails around my parts that are easy to access. I push it harder than my HT, but my HT has been through rougher stuff.

 

[Straz85]

Bontrager 29-3 2.0's on the bike. These tires weigh about 445ish each and have great traction.

That's not for the TLR version, those are claimed 540g and when I weighed mine, they came in right around that weight.

 

[BruceBrown]

I am 200lbs.

That's where I'd look to cut weight first. You'll reap many more benefits dropping 10 - 15 pounds than throwing a lot of money to trim a pound off of an already light bike.

 

[DukeNeverwinter]

With RaceFace going under, I am trying to find another crankset. Couldn't get the Next SL from them in time. Was thinking about Lightning, but unsure how there BB bearings will hold up in the BB95 Trek BB. Maybe I'll go ROTOR, or tried and true XTR.

Varaxis: cool, was thining about Fontana Super D on it. Now I will sign up.

Straz85: I weighed 1 non-tlr one last year and that's what it weighed. work very well for 5 months, until I tore a sidewall.

BruceBrown: well, Yeah, working on it.