Gum's CRUMPTON UL 4.40kg, 9.70lbs

[gumgardner]

So here's the final build. I've actually added about 120g by switching from the aerolites to the Keo blades. I may switch back to the Aerolites at some point but I need to get another pair of shoes, since I'm also using the Keo Blades on my Ruegamer. The final weight is 4.51kg with the Enve 1.25 and 4.71kg with the Enve 1.45 wheels. Currently I have Veloflex Extreme Tires (500g) on these wheels. I could get the bike into the 8lb range with a set of Tufo tires (-250g) and the aerolites (-120g), but for now I'm happy with everything is. I'll continue to tweak things though

Crumpton UL 666g (680g with matte finish)
THM Scapula SP fork 279g (uncut)
AX lightness AX4000 42cm Handlebars 144g (shortened...not sure of their final weight)
Lizard skin 1.8 Bar tape (50g?)
AX lightness Zeus Stem 110mm 65.5g
Berk Saddle Seatpost combo 120g (Test combo)
Thm Clavicula Crank "Tuned" 318g (324g original weight)
HSC PF30 ceramic bb 74g
FIbrelyte50t = 53g
FIbrelyte 36t = 25g
Red RDer = "Tuned" 112g (145g original weight)
Red FDer = "Tuned" 63g (69g original weight)
Red shifters = "Tuned" 254g (323g original weight)
BTP cage = 13g
Far and near chainring bolts 8g
AX lightness Orion brakes w/ carbon spring 118g (123g original weight
BBB roadstop brake pads 19g
Look Keo Blade 185g
Mcfk seat collar 8g
Mcfk derailleur clamp 7g
KCNC Morion M1 33g
Tune Top cap 5g

•ENVE 1.25 931g + Recon (11-23) 88g + Veloflex Extremes 500g
(w/ 6g of stickers removed)
•ENVE 1.45 1023g + Kcnc cassette (11-23) 117g + Veloflex 525g
(w/ 11g of stickers removed)

[fa63]

Needs one more bottle cage and the steerer trimmed, then it will be hard to fault. Nevertheless, great looking bike

[gumgardner]

So here's the final build. I've actually added about 120g by switching from the aerolites to the Keo blades. I may switch back to the Aerolites at some point but I need to get another pair of shoes, since I'm also using the Keo Blades on my Ruegamer. It's too much time to switch out cleats. The final weight is 4.51kg with the Enve 1.25 wheels and 4.71kg with the Enve 1.45 wheels. Currently I'm using the Veloflex Extreme Tires (500g), which are pretty heavy...but nice. I could get the bike into the 8lb range with a set of Tufo tires (-250g) and the aerolites (-120g). I also need to cut the fork, get rid of the spacers and file down the lawyer tabs.

Crumpton UL 666g (680g with matte finish)
THM Scapula SP fork 279g (uncut) (sanded with 6g of matte finish. Not sure of the final weight but it's lighter than the original 279g)
AX lightness AX4000 42cm Handlebars 144g (shortened...not sure of their final weight)
Lizard skin 1.8 Bar tape (50g?)
AX lightness Zeus Stem 110mm 65.5g
Berk Saddle Seatpost combo 120g (Test combo)
Thm Clavicula Crank "Tuned" 318g (324g original weight)
HSC PF30 ceramic bb 74g
FIbrelyte50t = 53g
FIbrelyte 36t = 25g
Red RDer = "Tuned" 112g (145g original weight)
Red FDer = "Tuned" 63g (69g original weight)
Red shifters = "Tuned" 254g (323g original weight)
BTP cage = 13g
Far and near chainring bolts 8g
AX lightness Orion brakes w/ carbon spring 118g (123g original weight)
BBB roadstop brake pads 19g
Look Keo Blade 185g
Mcfk seat collar 8g
Mcfk derailleur clamp 7g
KCNC Morion M1 33g
Tune Top cap 5g

•ENVE 1.25 931g + Recon (11-23) 88g + Veloflex Extremes 500g
(w/ 6g of stickers removed)
•ENVE 1.45 1023g + Kcnc cassette (11-23) 117g + Veloflex 525g
(w/ 11g of stickers removed)












By gumgardner at 2012-04-22

[tranzformer]

Not that I want him too and I probably shouldn't be saying this but Nick could be charging a lot more for this frame than he is, considering what the Cervelo California, cannondale and those other weenie frames are going for.

Isn't the Cannondale Evo frame set much cheaper than this? Evo retails for $3500 and any good team deal will get it for around $1600-1800. Crumptom's bikes are custom but definitely $$$$.

[cerro]

Really interesting build. But why the rear thing to stop the chain on ther inner plate on the derailleur? Take it away and it will be lighter and look better Don't need it either I know

[konky]

Gum you should be proud of your achievement. Also a testiment to how hard it is to get a rideable bike down to 4.5kg or 4.71kg with every day wheels. And that's with a crazy light frame. I guess it's the tuned items that have kept it below the 5kg.

[hetchins68]

[gumgardner]

Really interesting build. But why the rear thing to stop the chain on ther inner plate on the derailleur? Take it away and it will be lighter and look better Don't need it either I know

That's the Fibre-lyte plate. I could take it off but haven't gotten around to it. It probably weighs less than a gram.

[artray]

Awesome stuff Mr Gum . You can cut that bit off your rear mech cage , I have and it is fine, no issues .

[gumgardner]

Gum you should be proud of your achievement. Also a testiment to how hard it is to get a rideable bike down to 4.5kg or 4.71kg with every day wheels. And that's with a crazy light frame. I guess it's the tuned items that have kept it below the 5kg.

Thanks Konky. That's what I was going for. Anyone could ride this and not have to worry about it failing.

I know I could go lighter with a different set of wheels. I could also go lighter with downtube shifters, but I don't think I want to get into that. Everything else is pretty much as light as you can go. I'll keep looking though.

[gumgardner]

Not that I want him too and I probably shouldn't be saying this but Nick could be charging a lot more for this frame than he is, considering what the Cervelo California, cannondale and those other weenie frames are going for.

Isn't the Cannondale Evo frame set much cheaper than this? Evo retails for $3500 and any good team deal will get it for around $1600-1800. Crumptom's bikes are custom but definitely $$$$.

Is the cannonade in a size 557cm really coming in at this weight? Anyways, The custom geometry is amazing. Unless if you've had a bike made for you, you don't know what you are missing.

[tranzformer]

Is the cannonade in a size 557cm really coming in at this weight? Anyways, The custom geometry is amazing. Unless if you've had a bike made for you, you don't know what you are missing.

You are the one that wrote "considering what the Cervelo California, cannondale and those other weenie frames are going for." So I was just responding to you bringing up the Evo. I haven't looked at Crumpton's pricing in a while but assume this frameset is what ~$6500? Sure it is custom and if read my post closely I admitted that. Still doesn't take away from the $$$. Definitely a nice bike and great weight on it. I wasn't trying to start anything.

[tonytourist]

It looks awesome with the 1.25s on

[Epic-o]

It's the first bike that I've seen with a crankset wider than the downtube

[nicrump]

Crumpton's pricing in a while but assume this frameset is what ~$6500?

no, considerably less.