New frame to reduce weight

iso2000

I have a 2016 Trek Domane 4.5. I have changed the wheels but the bike is still 9kg according to my scales. I would really like to reduce the weight of the bike and I'm thinking of looking out for price reductions in 2019 frames in the coming months.

Bike:
https://archive.trekbikes.com/ca/en/2016/Trek/domane_4_5_disc_compact#/ca/en/2016/Trek/domane_4_5_disc_compact/details

My first issue is that I don't know how much my existing frame weighs. I have contacted Trek but they didn't know. I have broken down the components but this seems to give a frame weight of 3kg. Does this look correct?

In grams:
Wheels 1,500 Hunt Aero Light
Groupset 2,500 Shimano 6800 Disc
Bars/stem 450 Pro Alloy bars - 42
Saddle 210 Sella Italia SLR
Seatpost 250 Trek alloy
Tyres 660 Hutchinson Performance
Peddles 350 SPD
Tape, etc 100
Total 6,020
Bike Weight 9,000
Therefore Frame = 2,980

In comparison a 2019 Domane SL frame is 2kg. A Domane SLR is 1.9kg. An Emonda SLR is 1.4kg.

Does this all sound correct? If I change to a Domane SL will I be saving nearly 1kg in weight? It will also have the front ISO Speed.

joe_totale-2

Disc Rotors and Headset are two things that come to mind that you've missed.

keef66

Are you talking about the weight of the frame or the frameset, ie frame and fork?? Nearly 3 kg sounds a bit porky for a CF frameset TBH

Does your groupset weight include the BB? Does the wheel weight include axles / skewers as appropriate? Have you weighed them?

By comparison my CR1-SL frame is under a kilo including the factory fit BB, and the fork is a bit over 300g, so up there with the lightest Emonda.

Easiest way to find out is to strip it down and weigh it. Be disastrous to splurge on a new frame only to find it's only reduced the bike weight by 200g

Matthewfalle

wheels were a bad mistake, but hey ho too late.

follow advice above re frame. what do you want to do with it?

#chubby

Matthewfalle

have you added bottle cages and bolts, seat clamp, skewers, etc.

disc groupset will most probs be heavier than caliper as well .....

#heft

bobones

3 kg is way too much. I'd' guess a max of 1400 g for frame and 500 g for fork and that's hefty. Have you included cassette and cables? For comparison, my 2012 Scott CR1 frame is 950 g and fork is 390 g. Your best bet is to strip it and weight each component. Here's a spreadsheet I did last year which may give you some ideas (click for larger image).

whyamihere

Are you using claimed weights or measured for the bits you have weights for? Hunt wheels are pretty well known for being heavier than they claim, and other claimed weights tend to be a bit optimistic.

cougie

Your frame is nearer 1kg than 3kg.

I'd really not fret about the weight of it though. Can you tell the difference between full and empty water bottles on your bike ?

iso2000

Thanks for the replies. Frame weights above include forks. I must be under estimating the weight of the groupset, think I saw the rim brake version weighing 2.3kg so the disc version must be more like 2.8kg, if not more. With the other additions suggested above I'm guessing the frame is around 2.4kg so the Domane SL frame is 0.37kg lighter which sounds about right as it has a higher quality carbon and direct mount brakes.

I'll keep the current bike and see what happens with the 2020 models.

w00dster

Weight is always a strange one, as Cougie says, can you tell the difference between having a full bottle and an empty bottle on the bike?
But then I had an Emonda SLR (approx 6.5kgs) and it was an awesome bike. I also have a Domane Disc (the SL series with 105 and 40mm wheels), it weighs just under 9kgs. I can tell the difference between the two and would much prefer to be on the Emonda, not just for climbing, but overall the lighter frame just feels great to ride on.
I'm about to start on a weight weenie mission on the Domane, but nothing silly, just lighter bars, stem and will probably also go Ultegra chainset and cassette.
I don't think I can get mine too light, maybe down to 8.2kgs.

keef66

Unless you want to join the ranks of weight weenies who see minimising bike weight as an objective in itself*, I'd not worry too much about it. I struggle to see a massive difference in ride experience between my CR1-SL and my (good) alu winter bike TBH.

If you weigh 70kg and the bike is 9kg with 2 full bottles, pump, puncture kit etc, shaving a kilo off the bike weight would only represent a 1.3% reduction in the weight you're lugging up every hill. And losing a kilo could be quite expensive.

Biggest difference I ever made to my cycling and climbing in particular was shifting 8kg from round my middle, and that cost nothing at all.

*If you do want to join them, that's fine too. Just be warned that it can get expensive, and some of the silly light components, especially wheels, can be less durable.

edward.s

Have a good crap before you go out and forget about loosing weight from the frame. Bike weight doesnt make much difference to the average rider (within reason). I've set PBs on my 11.5kg steel CDF, faster than on my 8.7kg 'good' bike.

darkhairedlord

Don't forget the air in the tyres.

joe_totale-2

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

darkhairedlord

Joe Totale wrote:

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

Im confused, is the steel bike 11kg or 9kg ?

joe_totale-2

darkhairedlord wrote:

Joe Totale wrote:

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

Im confused, is the steel bike 11kg or 9kg ?

The luxury of having 3 bikes! The steel one is 11kg and the alloy winter bike is 9kg.

darkhairedlord

Joe Totale wrote:

darkhairedlord wrote:

Joe Totale wrote:

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

Im confused, is the steel bike 11kg or 9kg ?

The luxury of having 3 bikes! The steel one is 11kg and the alloy winter bike is 9kg.

So is that two steel bikes or one steel and one aluminium?

joe_totale-2

darkhairedlord wrote:

Joe Totale wrote:

darkhairedlord wrote:

Joe Totale wrote:

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

Im confused, is the steel bike 11kg or 9kg ?

The luxury of having 3 bikes! The steel one is 11kg and the alloy winter bike is 9kg.

So is that two steel bikes or one steel and one aluminium?

One steel, one aluminium.

keef66

Joe Totale wrote:

darkhairedlord wrote:

Joe Totale wrote:

darkhairedlord wrote:

Joe Totale wrote:

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

Im confused, is the steel bike 11kg or 9kg ?

The luxury of having 3 bikes! The steel one is 11kg and the alloy winter bike is 9kg.

So is that two steel bikes or one steel and one aluminium?

One steel, one aluminium.

And one carbon.

Me too!

darkhairedlord

Joe Totale wrote:

darkhairedlord wrote:

Joe Totale wrote:

darkhairedlord wrote:

Joe Totale wrote:

I've set PR's on my 11kg steel single speed, none on the hills mind!

What I would say though is that my 6.5kg carbon bike is a lot more fun to ride than the 9kg alloy winter bike. It feels like it flies up the hills and accelerates so quickly but that could also be down to it being a stiffer, good quality carbon bike. On average I'm 2-3kph quicker on it but that's probably more down to the deeper wheels than the weight, it's definitely my fastest bike up the hills mind. It's hard to quantify 'fun' but I definitely enjoy riding it more.

Im confused, is the steel bike 11kg or 9kg ?

The luxury of having 3 bikes! The steel one is 11kg and the alloy winter bike is 9kg.

So is that two steel bikes or one steel and one aluminium?

One steel, one aluminium.

That's that cleared up then.