Alien Track bike

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Tallboy
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by Tallboy

I'm very excited- my new alien track frame has apparently left the factory in China- so now it goes to norway for checking and then I should have it soon. In the meantime I'm working out some weight savings, and starting my spec list.

This is a pure track race bike- mostly for sprints including kilo and keirin which are my favourite events- but will also do some bunch races on the track for fitness.

Obviously there aren't as many parts to save weight on with a track bike, and it needs to be tough to survive regular gear changing, lying around the track infield, and my 92kg weight- so I'll have to be creative- any tips would be welcome!

Anyone interested in aliens they are at http://alienbikes.com/v3/ .I'll be starting to weigh different bits over the next few days- most of the parts are still in use on my planet x. In the meantime I'll be looking at

1. how to modify the ISP clamp- any thoughts? it 'looks' heavy- might suprise me but i doubt it!
2. TT bars- something light and stiff to replace my steel nittos
3. custom garmin mount- to put a 500 series clamp behind the seat out of view- possibly as part of the ISP modification
4. bottom bracket- fairly sure something other than stronglight bb will fit so looking for a ceramic replacement
5. chainrings- currently a big chunk of metal- looking at custom options to shave some weight
6. ti bolt kits- thinking stem, seatclamp, chainrings could all be lighter
Attachments
ISP detail.jpg
Alien frame.jpg
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by Weenie


Tallboy
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by Tallboy

How do you post a table of parts/ weights? I've tried copying in and attaching
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CarpetFibre
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Joined: Thu Apr 01, 2010 10:24 am

by CarpetFibre

For TT bars, you can't go wrong with Easton Attacks - they're super light (the lightest TT bar if I recall correctly) @ ~350g, and also extremely stiff. It's difficult to find stiff TT bars these days (stay away from carbon Vision bars).

I can also say that the Alpina TT bars are very good indeed - extremely stiff (stiffer than the Eastons), and marginally heavier at ~450g.

Beware though, the Eastons are not UCI legal (I think they fall slightly foul of the 3:1 rule). The new ones might be okay, but the old ones are a bargain and you can pick up a second hand pair for £200 - £250.

As for chainrings - I'd say it's worth giving fibre-lyte a call, they make aero carbon chainrings that can be made to fit your crank spider. They're very light and tough, and they'll make pretty much every size so you can get just the gear you want. Plus you'll only need one so it won't get too expensive.

Good luck!

Tallboy
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by Tallboy

thanks pal, yes fibrelyte were on my list- I just need to confirm my race gear otherwise it could be an expensive training ring! Ti bolts for the stem are on the way, in theory 2g per bolt which is good. I think I will go for a bare ti/metal finish on all extras to complement the black frame (and save weight on paint!)

for bars I'm looking at easton or maybe a custom solution now I have my position dialled in perfectly- ideally I want 34cm base bars for kilo starts so that limits me a bit!

anyone any tips on attaching this table of weights?
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Dalai
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Joined: Wed Dec 15, 2004 10:54 am
Location: Melbourne, Australia

by Dalai

Looking forward to seeing more photos of the bike when you get it and built up. All the photos on the alien website can't be enlarged...

Personally still not keen on the idea of a carbon chainring due to the extra high loads standing starts in particular require.

To attach a table, I'd suggest using a free screen capture tool like mwsnap and save as an image.

Tallboy
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by Tallboy

Alrighty, slr saddle has arrived and ti. Bolts are in the mail
Picking upmy corima 4 spoke from the shop tomorrow after getting new bearings, so I should have a nice little heap of bits to weigh this weekend

Once fibrelyte get back to me on ring thickness I will get that ordered, then it's time to sit on my hands waiting eagerly for the frame!
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Andrew69
Posts: 142
Joined: Thu Feb 19, 2009 10:52 am

by Andrew69

Are you planning on buying just one chainring?
I use four (48,49,50,51) as well as several sprockets depending on the event.

I know this is WW's and will probably get shouted down for saying this, but really , a track bike is one bike where weight is not a consideration for me.
Frame stiffness is paramount.
Aero is also a consideration, but weight? Not really

Still, good luck with the bike!

Tallboy
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by Tallboy

Andrew, yeh i already have 47-50 rings but I'm going for a fancy 'race day' ring for my kilo bike just for fun really, I like a pointless project!
Aero is taken care of already, as is strength, so now it's about fiddling tiny savings in weight where possible/ safe just for my own pleasure

I only race track so I'd never bother ww'ing my road or mtb since they are just training tools- it would be as daft as having carpet in my weight room, but since I spend half my week on or looking at my track bike iay as well trick it out a bit!
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Andrew69
Posts: 142
Joined: Thu Feb 19, 2009 10:52 am

by Andrew69

Tallboy wrote:I'm going for a fancy 'race day' ring for my kilo bike just for fun really, I like a pointless project!

Lol, cant argue with logic like that! :beerchug:

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kavitator
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by kavitator

pictures on link doesnt work all :roll:

I have RTS road frame...seat clamp and headset is same, maby this are from same factory...great frame!

Tallboy
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by Tallboy

yes, it might well be from the same factory- the bulk of the frame is not much new- the guy who runs alien just specced a few minor changes over some available- the dropouts we picked based on df3 style, there's no bump where bottle bolts should go, and the geometry is basically custom for me and him- though more will be available

slow progress waiting for the frame so far- I've been modifying a few bits and will weigh everything once it's all done (need to borrow an accurate scale)

Thomson stem- fairly easy- just swapped out the bolts for some ti bolts off ebay
Saddle- stripped a cheap slr off ebay that had a bit of minor scuffing on the surface- just need to sand gently a dimple in the middle and give it some more clean up round the edges. It's wet in the photo from giving it a quick rinse to get paintbrush cleaner off

Carbon Fibre Lyte ring is going on order today- 49 tooth bare carbon aero should be about 85g hopefully- the guys are confident the ring will survive my kilo starts- if it doesn't work in training then we'll put this down to a lesson learnt!
Corima 4 spoke is next to be destickered, and then tub glued up
Pursuit bars are off being cut down to my preferred 34cm and re welded- might not work my pal tells me but we'll see

Still looking at options for headset top cap (maybe fibre lyte?) and bolt, ti chainring bolts, chain and ISP cap tuning- maybe some sort of custom mount using cut up steerer tube sliced in half and some of the thomson post mod tricks learnt here

thanks for looking..keep any ideas coming!
Attachments
seat1.JPG
selle slr stripped
stem.JPG
thomson stem tuned with 2g ti bolts
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Tallboy
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by Tallboy

while I kick my heels waiting for the frame I cleaned up my corima 4 spoke ready for new tub gluing. Obviously not essential to clean it back to the carbon but since I had time I might as well start from fresh and do a nice neat job.
Now to decide on a front tub that will work indoors and outdoors, glue up well and hopefully last a season of racing..hmm
Using a fairly crude scale this is 825g with the skewer bolts, but no glue/tyre. Not bad for £200

Also looking at bars today- I sold a ton of old kit on ebay so I'm treating myself to new bars. Ideally I'd like 34-36cm width so it's nitto or alpina basically- I cant find the right model/width combo of nitto to fit oversize stems (dont like the skinny tops on the 25.4 fit) so it might have to be 300g of carbon loveliness http://www.brookscycles.co.uk/alpina-ca ... aign=Gbase

Not light by road standards but Chris Hoy uses these on and off so they are likely to be strong enough!
Attachments
corima1.JPG
corima 4 spoke, for tt events
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Tallboy
Posts: 181
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by Tallboy

My frame is coming..my frame is coming.. :welcome:
Should be here in a couple of days..dremel time!
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Tallboy
Posts: 181
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by Tallboy

oh man, weight be damned..look at these custom bars
(pic stolen from naked bicycles' page)
Attachments
nakedbars.jpg
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Andrew69
Posts: 142
Joined: Thu Feb 19, 2009 10:52 am

by Andrew69

Those bars are nice and while maybe not light, you do save the stem weight....

by Weenie


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