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Post by tribanr500 on Jan 24, 2021 13:47:41 GMT
Hi
I'm going to replace a number of bits on my Triban T500 including wheels, pedals and seat with better (and slightly lighter) components bought second hand at sensible prices through eBay and thought i'd measure basic before / after weights.
My bike was purchased second hand and has a different (though not particularly comfort orientated) saddle and non-original plastic pedals however everything else is as standard. I was a bit shocked to see the scales indicate 11.5kg, some 900g heavier than the official weight!
Has anyone else had experience of weighing their Triban and finding this heavier than officially declared? I'm quite new to road cycling but wondered if this might be like the typical car industry approach where weights, power and performance figures are often over or under declared in official figures?
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Post by chas on Jan 24, 2021 15:59:25 GMT
Quoted bike weights don't usually include pedals, will be different for different sizes and yes often disagree with measured weights. It's easy to become obsessed with weight as an easily quantifiable way to 'improve' your bike but unless you're a hill climb specialist it's far less significant to performance than adopting a slightly more aero position.
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Post by robertsims on Jan 24, 2021 19:16:45 GMT
What size is your bike vs the 'official' weight bike. Also usually no pedals.
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Post by Rocket on Jan 24, 2021 19:38:13 GMT
tribanr500 when were your scales calibrated? I've had a White Triban 3a which I replaced the steel forks for red carbon ones from a Triban 3 and I now have a Triban 500SE which I fitted 6800 Ultegra to. Both bikes weighed exactly what Decathlon stated when they were in standard specification. I have access to calibrated laboratory weighing equipment. There are a lot of weights for various components given in the technical section of this forum.
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Post by tribanr500 on Jan 25, 2021 11:47:39 GMT
Robertsims - Mine is 57cm which is the same frame they quote 10.6kg for I believe.
Rocket - I admit these measurements were taking rather crudely using standard (though good quality) bathroom scales with myself standing on with bike then deducting my reading (taken seconds later) with no bike.
Chas - It's interesting to know about the 'sans pedal reading' as I wasn't aware bike manufacturers calculated like this. This certainly accounts for around 300g of the difference. I would think with weight saving there is a balance to be found. I wouldn't say I've become obsessed with improving performance but I'm definitely interested to experiment with a few changes to see how these influence how the bike rides and feels (also making other changes such pro endurance 4 tyres in slighty wider 28 configuration). I must say I've never heard a car manufacturer claim to improve the performance or feel of a model (think gt3 rs etc) by increasing weight. There are tangible benefits to reducing both sprung and unsprung mass however I accept these will be much less evident on a bicycle.
As I'm quite an experienced 'eBayer' both bike and parts have been purchased very cheaply. Once spares are sold off (including surplus bits coming with what I've ordered) total cost to me of the bike plus upgrades should be around 54% of the purchase cost of the T500 when new. Even if there's no tangible benefit at all from the changes I'll at least be free of the stock Triban wheels!
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Post by chas on Jan 25, 2021 14:36:24 GMT
I would agree, everything to do with cycling is about balance...  I think your new tyres will make the biggest difference to the feel and performance of the bike, I have the equivalent Krylions on my RC520 and am very happy with them. I'm not saying extra weight is a good thing though it can add stability and a mate at cx said he preferred his heavier alloy bike on a course with deep mud sections as the weight carried it through. In saving weight though you can sacrifice stiffness which can sap power and compromise handling. I remember a poster on here a few years ago recounting how he had bought a lightweight carbon frameset and wheels from china only to find he preferred riding his Triban. I think a lot of us, particularly at this time of year enjoy tinkering as much as riding, have fun and we look forward to hearing how you get on once out on the road. |
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Post by tribanr500 on Jan 29, 2021 11:16:29 GMT
Hi
Everything is on the bike now and i'm pleased to say there's been a significant weight saving overall (not that weight is in anyway important of course!). I'd like to put some pictures up when i provide a proper account of the changes to the bike. What's the easiest way of storing photos online so this forum can access them? (i've had no luck attaching from computer).
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Post by bandit3 on Jan 29, 2021 13:31:45 GMT
I've used "imgur" You set it up & upload your photos then it gives you options to send to your post that you create on here . Not done it for a while but someone might make it a bit clearer .
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Post by bandit3 on Jan 29, 2021 13:33:40 GMT
I've used "imgur" You set it up & upload your photos then it gives you options to send to your post that you create on here . Not done it for a while but someone might make it a bit clearer . This I've done on the PC not on the mobile . |
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Post by chas on Jan 29, 2021 15:45:41 GMT
They need to be stored online so you can put a link in here. Free sites we've used in the past have started charging, I'm not sure what's available now but if you're on strava you can upload a picture of your bike there and link to here like this:  You have to do it from the dashboard not the activity page, (sorry they're not Tribans) |
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Post by tribanr500 on Jan 29, 2021 16:25:25 GMT
Ah ok. Blue bike looks great by the way, what mudguards are those? The ones I ordered aren't compatible with my frame.
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Post by chas on Jan 29, 2021 16:48:53 GMT
I think they're Stronglight 42mm, I couldn't find SKS in that size at the time and have got 32mm tyres for rougher roads/paths so needed something a bit wider than the normal 35mm. The bike's a cheap Planet X cyclocross frameset so has loads of clearance.
What's the problem with the guards you've bought?
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Post by tribanr500 on Feb 3, 2021 10:17:08 GMT
I went for Crud Roadracer mk3's however as the frame tubing at the rear (inside) is triangular and the mk3's rely on velcro tabs to attach, there's nowhere to secure these (frame is essentially a pointed edge in the exact place this needs to be flat in order to attach).
I'm going to return the mk3's and have already purchased a RRP RearGuard (road version) as I've been amazed how dry I've been left with no guards at all even when riding in the pouring rain. It seems road bikes throw up a hell of a lot less than the mountain bike's I'm used to. I don't ride in groups or anything so can always change my mind later.
I'm going to try to give the bike a bit of a clean up soon and post in the 'My B'Twin' section once I've found an appropriate photo upload site but there's been a notable improvement to both how the bike rides and looks.
I did some slightly longer rides 3 days in a row from Saturday to Monday and have been finding riding the bike quite a buzz and a bit addictive if I'm honest. I'm keen to build up my stamina and overall average speed but it seems it's something that can't exactly be rushed!
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