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Discussion Starter · #1 ·
So I put the order in at my LBS for an Altitude frame!!

Now I've got a few big decisions to make...especially for the fork.

I'm not sure which fork I should get, but whichever one it is, I think I need to keep in mind how different axle to crown lengths will affect the head angle.

I did see on the Rocky Website that the Altitude is specced with either the Fox 34 or the Rockshox Revelation, and both forks produce the same head angle range (66.6-68.3).

The website also shows the Fox 34 set to 150mm? How do they change this from the stock160mm? Does this modification change the axle to crown length?

Any thoughts on going with the Revelation Dual Air to save 1/2 pound vs. the Fox 34? Other fork ideas?

2013 RockShox Revelation RCT3 Dual Postion 650B 15QR Tapered Air Fork - Pro Bike Supply

For drivetrain I'm thinking Sram 1x11 with 28 tooth front ring.
 

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Discussion Starter · #5 · (Edited)
The Fox fork can be travel reduced from 160mm with a 10mm spacer, and that does reduce A2C by 10mm. But the 34mm stanchions on the fork will be much stiffer than the 32mm on the RS Revelation, that would be worth the extra 200gms.

Here's the Fox A2C spec http://service.foxracingshox.com/co...ings/2013/2013_FOX_34_27-5_USER_SPEC_RevC.pdf
Thanks Rocky...looks like the 150mm setting is 544.4mm.

Now...if you had the option between a "32 FLOAT 150 FIT CTD w/Trail Adjust" (if they made it in 27.5) and the "34 FLOAT 27.5 160 FIT CTD w/Trail Adjust" shimmed to 150mm, which would you (for your own riding) take on the new Altitude? Extra stiffness or 1/2" lb less up front?
 

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Since I'm close to 200 pounds, I'd go for the 34mm Fox fork. If I were 50 pounds lighter, the 32mm Revelation would likely be stiff enough.

The guys at my LBS told me how much that SRAM 11 speed setup costs: $425 for the cassette, $285 for the cranks with 32T ring, about $100-130 for new chainrings or different tooth counts, $305 for the rear derailleur, and $175 for the rear shifter. So almost $1200 plus the DT Swiss rear hub upgrade at $100.
 

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Nice. I have the 790 complete bike on order. The only parts I'm a bit unsure of are the brakes and saddle. I haven't had the best experience with Avid/SRAM hydraulic brakes and I've been using WTB Rocket V saddles for a long time.

I'll probably pick up another set of Answer Roves for the bike. I've been really happy with them on my SS.
 

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Discussion Starter · #10 ·
Since I'm close to 200 pounds, I'd go for the 34mm Fox fork. If I were 50 pounds lighter, the 32mm Revelation would likely be stiff enough.

The guys at my LBS told me how much that SRAM 11 speed setup costs: $425 for the cassette, $285 for the cranks with 32T ring, about $100-130 for new chainrings or different tooth counts, $305 for the rear derailleur, and $175 for the rear shifter. So almost $1200 plus the DT Swiss rear hub upgrade at $100.
I'm really stoked on the 1x11, I hope that I can get it before the frame arrives.

Only thing that gives me a little concern is the gearing ratios (I love my granny!!).

My current granny setup is 34/22 = 1.55 on 26" Rear.
Going to 42/28 = 1.5 is going to be a little higher gearing...but then you add on the 650B vs 26" and you lose about another 5% leverage??
So am I right in thinking that the total impact with 1x11 650B vs. my current setup is about ~8% higher geared granny? ...having my doubts now if this is true!!
 

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Discussion Starter · #11 ·
Nice. I have the 790 complete bike on order. The only parts I'm a bit unsure of are the brakes and saddle. I haven't had the best experience with Avid/SRAM hydraulic brakes and I've been using WTB Rocket V saddles for a long time.

I'll probably pick up another set of Answer Roves for the bike. I've been really happy with them on my SS.
I agree most of the bike looks pretty good, my question areas would be:

Not sure about the 34 vs. 32 fork...although Rocky says he would go for the 34 so I'm reconsidering.
I would prefer 1x11 vs. 2x10 if equipped with same granny ratio (42/28 vs. 36/24).
I would go for XTR Trail (or XT) brakes vs. the Avids.
I wouldn't want RaceFace or fi'zi:k on my bike (but only stem, handlebar and seat on this one though, so easy to change out).
Don't want the Rockshox Reverb Dropper Post.

Otherwise looks really good!
 

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Discussion Starter · #12 ·
Does anyone know about Q Factors? The XX1 Crankset comes in a 168 Q Factor or 156 Q Factor. I gather the 156 is narrower. What should I order for the Altitude?
 

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Discussion Starter · #14 ·

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Got an update from LBS today, frame is expected in January!!!!
Interesting :confused: An email from Rocky just yesterday (a guy Jeff) said March/April for the frames. Complete bikes will be sooner. Also he said most frames go to Europe and not N/A so if you want one it's best to pre-order before they sell out. Could be a bit of marketing hype there?

Appears the color for frame only will be the 790 carbon/yellow/greenish combo.

He also mentioned the weight of the 770 and 790 complete bikes

Here are some complete bike weights:

790 MSL 12.25kg/27.25lbs

770MSL 13kg/28.75lbs


Skyak,

Have you considered the White Bros. Loop fork @ 150mm? Very stiff for a 32mm fork and the thing works fantastic on my Jamis Dakar. Gets full travel with out crazy brake dive, designed for 650B wheels with a proper offset (41mm) and proper A/C height of 544 @ 150 setting.

I'm strongly considering the new Altitude frame set and would move my Loop and all the XO stuff over from the Jamis and sell the off frame. Jamis is very very nice but the Rocky will be even better I think. More travel, slacker with all the adjustments available, lighter and better rear suspension design. Should climb amazing I hope set up with steep angles.
 

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They always ship complete bikes first and bare frames later, and the frames are always in short supply in the first year of production, that's the way it was with the carbon 26" Elements. So you do want to order early if you want a frame only. Y
 

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Discussion Starter · #18 ·
skidad, are you sure the loop is 544 @ 150. I read somewhere that it was 534? I have been looking at the magura ts8 150, but the axle to crown is only 530 so i'm wavering...

So far I have purchased XX1 compatible wheels (Syncros TR1.0 Carbon 27.5), tires (Schwalbe Rocket Ron 2.25) and brakes (XTR Trail) for the bike.

I'm getting ready to buy the XX1 gripshift package when it is available...so the fork is the last key piece!!!
 

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skidad, are you sure the loop is 544 @ 150. I read somewhere that it was 534? I have been looking at the magura ts8 150, but the axle to crown is only 530 so i'm wavering...
Yes, you are correct the Loop is 534 @ 150. Me bad :eek: I've got to many A/C heights running through my brain.

What's the Fox 34's @ 150 on the production models?

X-Fusion Slant will be 545 @ 160 with 34 stanchions with gold slick anno treatment.

X Fusion Shox - RL2R
 
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