You are hereForums / By Discipline / Mountain (off road) / MTB Gear / How to build a bike using only a computer!

How to build a bike using only a computer!


pikey's picture

By pikey - Posted on 24 January 2010

NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.

Pikey’s Homemade JAMIS Dakar XCR Expert

By sitting on ones fat ass one can search the world for interesting bike bits, and before you know it you have enough bits to build a bike Smiling

Duration: Aprox 10 weeks
Cost: Half the price of buying a similar bike off the shelf in Australia (sorry local bike shops)
Assembly: Me.
Financier: Wife (Quote, for god’s sake go and buy a new bike and stop your whingeing Smiling )
All $ AUD

Frame: Jamis 2008 Dakar expert with RP2 shock (USA eBay) $450, Del $75, 2900g (second hand)

Shocks: 2009 Rock Shox SID World Cup carbon (USA eBay) $492, Del $52, 1495g (second hand)

Wheels: 2009 Crank Brothers, Cobalt XC (USA eBay) $674, Del $83, 1576g (second hand)

Brakes: 09 Hygia USAGI hydraulic disc brake F&R inc rotors & bolts, (Taiwan eBay) $149, Del $40 830g

Shifters: XTR M970 (CRC) $149, 120g x 2

Post: Idio Carbon (Taiwan eBay) $70, Del $13, 180g

Clamp: Wind Speed (Taiwan eBay) $19.99, 54g

Saddle: Dorcus (Taiwan eBay) $45, Del free, 225g

Stem: Idio Carbon, (Taiwan eBay) $70, Del $2, 125g

Stem spaces: Carbon (Taiwan eBay) $13, Del $4, 35g

Handle Bar: Dorcus carbon Fibre (Taiwan eBay) $95, Del Free, 142g

Front derailleur: XTR (Chain Reaction Cycles) $77, 160g

Rear Derailleur: SLX Shadow (Chain Reaction Cycles) $54, 260g

Grips: Velo lock on (Taiwan eBay) $15, Del $9, 100g

Chain: Sram PC991 (Chain Reaction Cycles) $35, 280g (Rohloff 300g)

Cassette: Sram PG990 (Chain Reaction Cycles)$74, 300g

Bottom bracket: Dorcus ceramic bearings (Taiwan eBay), $45, Del free, 94g

Cranks: LX (Chain Reaction Cycles)$75, 905g (XTR=795g not worth the $$ for 110g)

Pedals: Time Atac (CRC) $60, 385g

Tires: Maxxis Crossmark UST (CRC) $54 each, 720g each (wired non tubeless =575g each) Stans 120g

Gear housing: Alligator ILink (Taiwan eBay) $65, Del $9, 85g

Bottle Cage: Dorcus, aluminum (Taiwan eBay) $19, Del free, 45g

Jockey Wheels: KCNC (Taiwan eBay) $25, Del $5

see attached pic's for the close ups.

Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert Pikey’s Homemade JAMIS Dakar XCR Expert

Harry's picture

Very nice Greg - have you ridden it yet?

pikey's picture

Took it for a spin this afternoon, duck & centre.

It certainly felt lite.
Climbed easier than the Reign (15.5kg) as to be expected.
But I think I will have to flip the stem as I found it hard to keep the front wheel on the ground on the very steep sections.
Flying down the Duck water bars I certainly spent more time in the air Smiling
Got to get used to having pro pedal for the first time, on, off, on, oops should be off!
I don't like the frailty of the forks, the carbon SID world cup's have a lot of movement, I turn the handle bar and 0.2 of a sec later the wheel turns Sad
A learning curve I guess stepping down from my PIKE'S (I can move boulders with them)

I'm still keeping the 06 Reign but going to give her a paint job.

The best thing with the new bike is the chicks dig it Eye-wink

See you up the coast soon

Greg

PS: Rob, Thanks for sorting out the thumbnails.

Rob's picture

I see there's a few (or is it only 2?) spacers there, you don't want to try moving some (1?) up top first?

As for the soggy fork... ahem... should have gone a lefty Eye-wink

pikey's picture

Didn't think of that option!
Will let you know how it worked out.
Thanks Smiling

ar_junkie's picture

Didn't think it would be that easy to convert you to a Lefty!
Good on you for seeing the light Pikey... Eye-wink

hawkeye's picture

I got one not being used with 100mm travel if you're innerested. Eye-wink

pikey's picture

Hawkeye, (Rob & Junkie)

Firstly, These lefty Thingo's, can they take any skewer/hub?

Secondarily, what is the head set requirement (diameters) for fitting one of these oddities?

Thirdly, That is the travel of this lefty?

And most unimportantly, What are you selling this Lefty to me for provided it fits my new light weight beast? Eye-wink (PM me your $$)

(I need a different fork as I find the carbon SID world cup fork as flimsy as using two meat skewers as chop sticks Sad )

Thanks

Greg

ar_junkie's picture

Call AMI now... Evil
A Lefty will be much more stiffer than the SID and depending on which Lefty you get, probably lighter.

1st - nope, they require a Lefty specific hub, so a wheel rebuild (or new wheel will be required)
2nd - wider than what you have Eye-wink. Not sure on exact measurements, but you can get an adaptor they should sort it all out.
3rd - Hawkeye...

hawkeye's picture

are readily available off fleaBay, although the one you will need for this fork will the more expensive of the two types with the lower fork crown/clamp integrated.

Travel is, I think, 100mm. It comes with rebound adjustment only and no lockout - it's an older model (Lefty Jake) but is in excellent condition. Previous owner was a very fussy racer and we've not used it, as I swapped it off the bike for the 130mm version I had lying around when setting it up for my son. All the wear parts (eg pin races, boots, air filters) are common to currently available versions so parts are not a problem. But the things are pretty well bomb-proof anyway.

Price I haven;t thought about, but I'll research and give you an indicator tonight.

The thing with Lefty's is that the springs are specific to rider weight - if you could let me know what you weigh it will tell me whether the fork is suitable.

I've found Lefty wheelsets are usually quite cheaply acquired, again on fleabay, if you are prepared to be a little patient. My last purchase was a set of 700c rims with roadie tyres, disc rotors, cassette, and XT rear hub for $127. Just watch the age of the wheelset as the earlier ones have four-bolt discs.

Morgan's picture

Publish it here!

By the way, how's all this potential additional $$ stacking up in the Department of 'Er Indoors?

pikey's picture

a lefty is going to be my solution.

I don't plan on getting rid of my sexy Cobolt front wheel, although it can be easily converted to a 15mm axle so I might start investigating that option.

Thanks Anyway Smiling

pikey's picture

You have spent too much time working for the Gov........what is the department of "Er Indoors" ?

Justin's picture

That's one extremely sexy bike, pikey.

Morgan's picture

Replace ' with H and then watch an old skool episode of Minder......

hawkeye's picture

@Pikey: No worries mate.

You do know you'll have to try one sooner or later, though. Sticking out tongue

I have seen somewhere a shot of a Cranky Brothers wheel on a Lefty, which I thought looked great, but I'd expect that the hub would not be cheap nor readily available secondhand (ie, at the right price).

This upgradeitis is a difficult malaise! In the last year I've treated my Jekyll to new fork, bar, stem, and shock, etc etc, and most recently with Rob's and CRC's assistance the transmission and brakes. The only things that're original are the frame, wheels and discs. In race trim with CrossMax wheels, it's only the frame and seatbag. Laughing out loud

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.
Best Mountain Bike