Smallest cost x weight for a Production Bicycle

Discuss light weight issues concerning road bikes & parts.
mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

The goal of this thread, is to look for production bicycles (fully equipped bicycle) that give the smallest number for:
(P / $3000USD) * (W / 6800g)^3
or even simpler P*W^3
where P is price and W is weight of the entire bicycle (estimated for a 54 cm frame).

You can estimate a 30 gram difference, I think, for every 2cm change in frame size.
If bicycle is on sale at a reduced price, use the reduced price. Confounding the issue, is that prices may be different due to taxes in some countries, so if you can try to exclude tax or import tariff (numbers can be compared only if they are alike).

Let's divide P * W^3 by 10^12, as smaller numbers are easier on the eyes, and call this the PW factor.

Only Dura Ace, Sram Red, or Campagnolo Record / Super Record equipped bicycles need apply.

Cannondale? Trek? Cervelo? Specialized? Focus? Fuji? Giant? Felt?

note: updated to reflect feedback on our extreme weenie nature
Last edited by mekineer on Mon Mar 05, 2018 1:16 am, edited 9 times in total.

Tenlegs
Posts: 286
Joined: Wed Jul 16, 2008 10:37 am

by Tenlegs

So you're looking for a bike with a top end groupset with the cheapest frameset, wheels and components?
would it not be better to go for a bike with the best frameset/wheels in budget?

by Weenie


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Kayrehn
Posts: 1067
Joined: Thu Mar 24, 2011 6:06 pm

by Kayrehn

Stock bike weight is probably wildly inaccurate. This discussion will be useless.

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mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

Standardize to a 54cm frame? I'll update the initial post.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

Tenlegs wrote:
Fri Mar 02, 2018 12:27 pm
So you're looking for a bike with a top end groupset with the cheapest frameset, wheels and components?
would it not be better to go for a bike with the best frameset/wheels in budget?
Only if that leads to the lowest W*P number. If the weight goes up too much, then that may not be the case. Besides, companies such as the ones I listed, put forth their best frames with the top components.
Last edited by mekineer on Fri Mar 02, 2018 7:26 pm, edited 1 time in total.

bilwit
Posts: 825
Joined: Sun Apr 03, 2016 5:49 am
Location: Seattle, WA

by bilwit

Kayrehn wrote:
Fri Mar 02, 2018 12:32 pm
Stock bike weight is probably wildly inaccurate. This discussion will be useless.

Sent from my SM-G930F using Tapatalk
Not to mention that all the stock components are usually garbage unless you're paying a premium ($7k+), so if you end up changing out the stock parts (handlebars, stem, wheelset, etc) then the original stock bike weight is even more useless.

To the OP, if cost/value is priority, have you considered just buying a frame and sourcing the parts separately? This is the cheapest route to take to get the best parts, especially if you're deadset on a high end groupset (in contrast, getting a stock Ultegra bike is usually a bargain).

I don't think you should value stock weight at all.. just choose the one with the best frameset you like and go from there. You will always have the opportunity to upgrade parts and save weight afterward but you'll be stuck with the frameset.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

bilwit wrote:
Fri Mar 02, 2018 7:23 pm
Kayrehn wrote:
Fri Mar 02, 2018 12:32 pm
Stock bike weight is probably wildly inaccurate. This discussion will be useless.

Sent from my SM-G930F using Tapatalk
Not to mention that all the stock components are usually garbage unless you're paying a premium ($7k+), so if you end up changing out the stock parts (handlebars, stem, wheelset, etc) then the original stock bike weight is even more useless.

To the OP, if cost/value is priority, have you considered just buying a frame and sourcing the parts separately? This is the cheapest route to take to get the best parts, especially if you're deadset on a high end groupset (in contrast, getting a stock Ultegra bike is usually a bargain).

I don't think you should value stock weight at all.. just choose the one with the best frameset you like and go from there. You will always have the opportunity to upgrade parts and save weight afterward but you'll be stuck with the frameset.
Again, this is about getting the lowest number for Weight multiplied by Price. If they make the bike heavy with cheap components, they won't win here. Only if they optimize for lowest W * P.

Off topic, is that I have made a bicycle from parts. That's not what this thread happens to be about.

morganb
Posts: 552
Joined: Wed Mar 15, 2017 5:30 pm

by morganb

I remember seeing someone trying to find the lightest bike for a set budget with new components at online prices (not MSRP), I think they settled on a closeout Rose X-Light and built it up with Red. I don't remember the final price but it was definitely in the 6.8kg or less range and <3k Euro.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

morganb wrote:
Fri Mar 02, 2018 7:50 pm
I remember seeing someone trying to find the lightest bike for a set budget with new components at online prices (not MSRP), I think they settled on a closeout Rose X-Light and built it up with Red. I don't remember the final price but it was definitely in the 6.8kg or less range and <3k Euro.
I looked, and couldn't find this bike. The only stock production bike from Rose, with top groupset, does not come with Red. It comes with dura ace: https://www.rosebikes.com/bike/rose-bac ... id:2681132
which gives the PW factor: 7655g * 3572 usd (2900 euros)

PW^3 factor 16.1
Last edited by mekineer on Sun Mar 04, 2018 7:06 pm, edited 3 times in total.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

Weight weenies front page drew me to this:
https://www.planetx.co.uk/i/q/CBVIMAX40 ... -road-bike

PW factor: 7550g * 2464 usd (2000 euros)
PW^3 factor: 10.6

Wow, I didn't think you could get a top groupset on a bike for under $3000 usd. Revising original thread.
On this bike, the wheels are over 2kg! But it gets you something ready to ride if you don't have the $$ or time to be a batshit crazy weenie who has spent tons of time looking at bicycle parts for weeks (father, I have sinned).
Last edited by mekineer on Sun Mar 04, 2018 7:07 pm, edited 2 times in total.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

https://giantnerd.com/products/tommaso- ... a-ace-9000
https://www.amazon.com/Tommaso-Superleg ... th=1&psc=1

PW factor: 7303+30g * 2550 usd (2070 euros)
PW factor (amazon): 7333g * 2300 usd
I added 30g, as the 7303 quoted was for size small, and the medium best fits a size 54cm (per original instruction). I'm forgiving that it has an ultegra crankset.

The PW factor, lets divide it by 10^6, to have a reasonable number. Both the bikes in the last two posts have a PW factor of 18.6. Update: with the amazon price, the PW factor is 16.9.

PW^3 factor: 9.07
Last edited by mekineer on Sun Mar 04, 2018 7:12 pm, edited 2 times in total.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

2017 Kestrel Legend SL Dura Ace
http://www.kestrelbicycles.com/road/leg ... o-dura-ace
6820g for what size who knows

http://www.bikecraze.com/Kestrel-Legend ... cB&click=4
3300 usd

Wow, the oval concept 724 wheelset is 1260g!? http://www.ovalconcepts.com/aero/wheels/724-wheels

PW factor is 22.5
PW^3 factor: 10.5
Last edited by mekineer on Sun Mar 04, 2018 7:18 pm, edited 2 times in total.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

Kestrel RT-1000 Dura Ace
http://www.bikecraze.com/Kestrel-RT-100 ... 171753.htm
7480g for what size who knows
2300 usd

PW factor is 17.2
PW^3 factor is 9.63
Last edited by mekineer on Mon Mar 05, 2018 2:02 am, edited 1 time in total.

mekineer
Posts: 22
Joined: Sun Feb 04, 2018 12:37 pm

by mekineer

Tomassi Zoncolan SL
https://tommasobikes.com/products/zoncolan-sl
14.5 lb bike!!!
6486g +30g small->medium
2900 usd with $100 discount code "march"

PW^3 factor is 8.02
Last edited by mekineer on Sun Mar 04, 2018 7:16 pm, edited 1 time in total.

by Weenie


Wookski
Posts: 752
Joined: Tue Feb 23, 2016 5:51 am

by Wookski

Canyon Ultimate CF Evo 10.0 SL AUD14,299 (USD11,109) @ 4.85kg. Decent frame and good components- it’s not worth talking about bikes over 6kg as this is weightweenies.

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