K2 / Proflex Riders Group
General => Tech Forum => Topic started by: rapiddescent on September 07, 2009, 05:16:40 am
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add your super light weight spec k2 and Proflex here, listing the components! (only for super nerdy bike builders). hopefully this will be useful so that folks who have acquired frames etc know which components work and how much they weigh. I used a set of electronic scales to measure everything.
Razorback RS Singlespeed - 22.38 lbs
I recently had the razorback powder coated blue with a blue glitter finish - I know, it is very pimpy but it's my singlespeed bike that I totally love. I nearly bought some SiD world cup forks, which would have reduced the weight to 21.5 lbs, but decided to spend the money on my Santa Cruz Bullit instead.
(http://www.proflex.demon.co.uk/photos/sbc/razorbackssNEW2_640.jpg)
Weights:
part weight
k2 razorback frame 2310
noleen push shock + bolts 285
crank bros normal pedals 270
surley singulator 105
FSA cranks + 32T + bashring 635
FSA Platinum 73mm BB 215
Bar end plugs 25
grips 120
Front Formula B4 Gold lever + cable + calipre 215
Rear Formula B4 Gold + lever + cable + calipre 260
Formula B4 rotors + bolts 235
Easton monkeylite 70 SL 135
FSA stem 135
FSA headset blue 105
marzocchi X-Fly 2001 + FSA headset plug 1690
sram pc91 chain 265
seat collar 20
noname seatpost 230
wtb seat 360
maxis flyweight xc 330
maxis flyweight xc 330
Maxxis Fly Weight Tube 105
Maxxis Fly Weight Tube 105
Easton XC One Disc Wheelset 1590
Easton XC One Disc Wheelset 0
singlespeed sproket 75
10.15 kg
22.38 lbs
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nice build. I am aiming for sub 24 with my Proflex 2000.
I need to wear out and upgrade my drivetrain though, as the stx-rc stuff is super heavy and get some real pedals as well.
Noleen mega air would bright your weight down too, they are about 1365g 80-100mm travel, and cheap if you could score one.
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noleen mega airs are super rare here in Scotland & UK because the UK distributor didn't sell many K2 bikes. I'll keep a lookout on ebay!
callum
rds
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The reason that I used my 12 year old XP-X on the London to Paris ride last weekend rather than buying a Tourer was that it weighs less than most bikes I would have bought!
I was really pleased to get the weight coming in at 12Kg (26.4lb)
That's pretty stock, but with Spinergy Rev Roks wheels; Continental Ultra 1.125" Tyres; Computer; Bottle cage; SPD's; Ti bar ends; Rear Rack; LED light; and Ti Coil Springs.
The only down side was the 10.5Kg of luggage that I hauled with it!
Anyway, it all went very well, 260 miles in 3 days:
Day 1 - 77 miles @15.5mph
Day 2 - 83 miles @14.5mph
Day 3 - 100 miles @13mph
and I comfortably kept up with (and even beat) my mates on their Tourers!
Well Pleased with the old PRO~FLEX !!
Lands End to John O'Groats in 2010!
Col.
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well done!
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What sort of weights have people been able to get a 955 down to?
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Terry's 956 is around 22lbs I think FWIW?
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Terry's 956 is around 22lbs I think FWIW?
That is my 957 actually. I will muster us a breakdown with picture hopefully soon. ;)
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oops - sorry thought it was a 956LE from memory ::) :-[ ;D
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I'm pretty sure that a x56 frame with off-road tyres could be brought down to sub 9.5kg (20lbs ish) with modern components. The main advances are with wheel technology and carbon bits.
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oops - sorry thought it was a 956LE from memory ::) :-[ ;D
That's ok, same style frame. ;D
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I'm pretty sure that a x56 frame with off-road tyres could be brought down to sub 9.5kg (20lbs ish) with modern components. The main advances are with wheel technology and carbon bits.
I like the sound of that !
What's a good weight for a modern xc tyre ?
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I would love to see some pics and breakdown of parts for those 22 lbs x56 and x57s.
I have noticed a lot of bargain bin parts these days to bring down weight "cheaply" (well cheap for weight weeniesm)
USE alien carbon seatposts go for cheap on ebay these days (got mine for $40), especially the the shorter length ones, perfect for most of our pro-flexes. 230mm weighs about 130 grams, 200 weighs 105grams.
Titec pluto stems are 125g, and are on ebay new for $15-25.
I am personally hoping to score a pair of Sun Ringle Black Flag wheelset. They are sub 1300g (non disc) and were on sale at one point for $400. The rims themselves are 350g, and the set uses 24 and 28 spokes for front and back rims respectively.
As for good weight for a modern xc tyre. Depends on $$ and application?
If going for all out weight weenieism Maxxis makes the maxxlite 285, which is 285g... but they are apparently meant for race day only as they wear out quickly. Oh they are also super narrow and don't offer that much traction.
I think the ultimate tire is the Schawbe rocket ron 2.1, at 410grams, it has great traction and light, and won't wear out as fast.
The above two tires are rather expensive. I use the IRC mibro 2.1 weighing in at 520g, the 1.95 versions are 450g.. They are like all mountain "lite" tires which I need for the trails around here and were <$20 a pop.
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Thanks for that :)
I have my eye on some 1.8 foldable fire xc pro's (the 120 tpi version) which I think are high 400's, they can be picked up at reasonable cost and get good reviews, any input on them - good or bad ?
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Just about everyone love the panaracer fire xc pros. Like you said though, just gotta get the much lighter Japanese made 120tpi versions.
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I'm a recent convert to Fire XC Pro's having only really had retro tyres up until recently :)
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(http://img.villagephotos.com/p/2005-6/1036595/100_3034.JPG)
Frame - Proflex 957 with Swinger rear shock and Simon Sealed bearing conversion 2467 grams
Crankset - Morati, alum chainrings and bolts, Am classic Ti BB with Ritchey Ti bolts 673
Wheels - x517 rims and spokes on XTR hubs 1560
Fork - Noleen MegaAir 1389
Stem - Race Face Deus (early release) 137
Handlebar - Easton CT2 Hi rise 175
Headset - Acros Deep Cup 125
Pedals - Girvin MagTi 285
Tubes - Maxxis Flyweight 150 - 175 160
Tire Front - Kenda Klimax 347 L3R 347
Tire Rear - Maxxis 330 330
Rim Strip - Ritchey WCS 10
Seatpost - Easton CT2 cut 180
Saddle - WTB SST98 285
Seatpost clamp - Nashbar road 15
V brakeset - Avid Mag with Ti hardware and shaved 580
Shifters - Centera gripshift 180
Cassette - Tioga 8 speed 255
Grips - Generic Foam 20
Chain - Shimano XT 320
Front Deraileur - XT 135
Rear Derailleur - XTR 210
Skewers - Generic Bolt on from Toronto Cycles 65
Cables - Shimano 60
Stan's sealant in tubes 100 _______
Total 10014 grams = 22.06 lbs (Please check my math ::) )
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That is nice. Very nice. I actually didn't realise you could get these frames this light.
I had been contemplating putting all the XTR off my Norco Faze onto the 955, now I might just have to do it once I can get a new set of brakes and a nice wheelset.
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your BB+ cranks are really damn light D:
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super clean ride ;D. I have a beater 1972 Schwinn Continental road bike that I use when my proflex is in the shop. It comes in at 42 lbs...haha almost double. Good work.
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yeah - the 857/957 and 856/956 frames are lighter than todays XC full suspension frames. Coupled with modern parts, you can get to 10kg - like shovelon above.
You'll really feel the bike accelerate and climb extremely well - they ping around a bit on rocky sections though. I had a bit of a fall at the weekend because I tried to ride my orange 5 (26 lbs) at the same speed I ride the santa cruz bullit (35 lbs!) along a technical section. The O5 pinged off some roots and sent me off the side of the trail. I wouldn't even try it on the razorback.
I have the maxxis flyweight tyres on the razorback; but only use them for race day. I use panaracer cinders 2.25 as my normal tyre on the orange 5 and the k2 razorback. We need big tyres here in Stirling because most trails are steep and technical.