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Post by cbrdeano on Jul 5, 2013 13:22:38 GMT
T3 is 30/25 lowest gear so 1.200 ratio T7 is 34/27 lowest gear so 1.259 ratio
Although it is not much - the T7 will go further per crank revolution than the T3 in lowest gear.
Changing the T7 cassette to one with a 28 large gear will give you 34/28 lowest so 1.214 Closer but still not quite as low as the T3 lowest.
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Deleted
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Post by Deleted on Jul 5, 2013 13:38:36 GMT
Oh that's interesting. Any idea how much a difference that would make eg is the T7s lowest like the second lowest on the T3?
Unfortunetly at the moment it feels like its harder work than even that!
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Deleted
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Post by Deleted on Jul 5, 2013 14:20:38 GMT
I don't think the lowest gears are the same. The T3's granny is a 30T and comes with a 12-25 cassette producing 31.5 gear inches. The T7 has a 34T inner chainring with a 12-27T cassette producing 33.1 gear inches. edit: doh... only an hour later than deano..!!
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Post by cbrdeano on Jul 5, 2013 15:00:40 GMT
Oh that's interesting. Any idea how much a difference that would make eg is the T7s lowest like the second lowest on the T3? Unfortunetly at the moment it feels like its harder work than even that! T3 lowest is 30/25 = ratio 1.200 T7 lowest is 34/27 = ratio 1.259 T3 next lowest 30/23 = ratio 1.304 So the T7 lowest is in between the T3 bottom two gears. Just a thought - are you sure you are getting in to the lowest ratio on the T7 ? - ie have you checked it goes in to ALL gears ?
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Deleted
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Post by Deleted on Jul 5, 2013 19:13:56 GMT
Yes, definitely in the lowest gear - small ring on the front, largest on the back. Hmmmm, maybe its just perception but I was definitely struggling, and on hills that I wouldnt even have used the very lowest on the T3. Standing climbs felt similar, it was just when seated it felt tougher than usual.
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Deleted
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Post by Deleted on Jul 5, 2013 19:26:41 GMT
Ami missing something -isnt the T7 also aluminium and not carbon ?
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Post by Deleted on Jul 5, 2013 21:37:49 GMT
Yes,the T7 is alu with carbon forks and seat stays
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Post by cbrdeano on Jul 5, 2013 21:54:54 GMT
Yes,the T7 is alu with carbon forks and seat stays Any chance you still have your T3 so you can do some comparison measurements ? Although you are getting used to it - perhaps something is not set up as per your T3 Have you checked wheels for bearing freeness ? Are the tyres the same size / make / weight ? Are the tyre pressures the same ? Brake blocks rubbing on the wheels ?
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Post by chas on Jul 8, 2013 12:31:50 GMT
It sounds to me as if you need to raise your saddle a bit, it's hard to measure with different saddles, raise it a bit and see how it feels. If you feel as if you have to rock your hips to reach the pedals put it back down a little. The bottom gear on the two bikes is nearly the same, the 7 has a 34/28 lowest not 34/27 as stated by others. If you really feel the need you can put a 30t cassette on and have lower gears than a standard T3
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Deleted
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Post by Deleted on Jul 8, 2013 13:06:23 GMT
Thanks chas, I've had a bit of a play round with the saddle - I think the problem last week might have actually been I put it up too high for my pedalling style. I tend to drive with the heels so whilst I wasnt getting into hip rocking territory I was in a position more suited to someone who pushes through their forefoot. That's my best guess anyway! It would explain why I struggled seated but not standing.
I managed to cope with the Isle of Wight hills yesterday anyway, which in that heat was hard going. I feel like I've got a massive hangover today without the fun of the drinking!
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Post by chas on Jul 8, 2013 13:18:11 GMT
Well done yesterday, I can sympathise with the 'hangover' I sometimes get that. Something else worth playing with is your cleat position, something else that can make a big difference and unlikely to be right first time.
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Deleted
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Post by Deleted on Jul 8, 2013 13:57:52 GMT
Do you think if I'm more of a 'heel' person it might be of benefit to move the cleats back a bit?
I was watching people yesterday how they use their feet and its amazing the different styles and positions you see - and how some things that look downright uncomfortable are obviously what works for that person. It doesnt seem to be related to their speed either!
I'm averaging a good 2-3kph faster on long rides with the T7 as opposed to the T3, I think its pretty much all down to the higher speeds I'm maintaining on the flat.
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Post by chas on Jul 8, 2013 14:21:32 GMT
Not sure tbh I've always set mine directly under the ball of my foot but I've read theories on the net for further foreward and back. How does it feel compared to where you were putting your foot before? I pedal with my heel high, and cleat position has an effect on saddle height so be prepared to alter both.
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panda
Domestique
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Post by panda on Jul 8, 2013 14:42:45 GMT
Re: Time to step up...
This goes around my head quite a bit as I have done a few upgrades on my T3 and I think....what next. I don't know if everyone will agree, but I think that if you are going to upgrade from the T3, then you should be looking for a big improvement, or you could save some money! The T7 is very nice, but I don't know if it will be the kind of improvement that will make a massive difference to your enjoyment over the T3. I would say that the main thing you will notice is better shifters and crank.
The FC range is definitely suited to a more sporty ride due to its geometry. If it was me, I would seriously consider some of the PlanetX deals that have been already mentioned on this thread, they have full carbon with SRAM rival for Β£1K, which is silly money for the spec (they did have one in their sale for Β£800 with the same spec - but this is gone now).
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