Wrong crank installed

sexpot

Hello all just need some advice here.

I was getting a repair done do my racer today giant ocr 2 in a certain bike shop in town. All was not going well and it was decided that I need a new crank. Fair enough I said, when asked what one I liked I said I didn't know as I was knew to this cycling malark. So he recommended a truvativ isoflow. http://www.wiggle.co.uk/p/cycle/7/Truvativ_Isoflow_Trekking_Tapered_Triple_Chainset/5360021264/. I asked would that be suitable to which he replied yes. So it done. Off i went anyway but as I'm the sceptical type I researched it and it turns out these are more for MTB's. Should I go in and ask for a refund or does it really matter? I have noticed the bike is a lot heavier since its been installed.

niceonetom

who did that to your bike? a 4-bolt mtb crank on a road bike? that's shameful.

whatever about the weight, you've also lost a lot of teeth there. 48-38-28 is a bizarre set up for the road unless you like to climb cliffs on the bike.

i'd go back and ask to have it changed to a ROAD crank, but tbh, i think they might just say that once it's installed it's sold and that's that. You might have a fight on your hands.

name and shame i say.

kenmc

name and shame.
you might be able to claim it's "not suitable for the purpose intended" as it's for a mountain bike, not a road bike and get it replaced.
sounds like a right shower of muppets.

sexpot

It was cycleways on parnell street. I wonder will I have a case as its not fit for purpose. I sent an email over anyway. Might ring in the morning. Thanks for the advice

Drapper

cycle the feckin bike! probably a few grams in the difference! does it make you slower or more keen to go faster??

mgadget

It's unorthodox but it is not as bad as it sounds, the mechanic was using what was available to get your bike on the road for the least cost and least delay. Your bike sounds old enough 5 years? and the relentless changes in components in those few years is amazing, even the 'cheap' Shimano tiagra groupset is 10 speed, and uses a different bottom bracket which would cost you more. If cost isn't an issue then take it back and talk it over with the mech.
You're losing two teeth on each chainring compared to a road triple, makes climbing easier but your flat out top speed will be lower for the equivalent cadence.

Up to yourself, if its running sweet, gear changes are no worse than before and you are not racing, it would do the job and last a few years.
Weight of that Trutativ chainset seems to be around 100grms heavier than that 10 speed Tiagra. Less than the weight of a mobile phone.

stuf

mgadget wrote: »

It's unorthodox but it is not as bad as it sounds, the mechanic was using what was available to get your bike on the road for the least cost and least delay. Your bike sounds old enough 5 years?

Sorry but that's rubbish - there's plenty of Shimano options under Tiagra and you don't have to use Shimano in any case.

It was bad advice full stop

sexpot

Its definitely heavier than a mobile phone, I guarantee that. I can actually notice the weight difference. Went for a good cycle today. Didn't notice any real difference I suppose but its just something thats gonna nag. Might go back into them on monday and see what they say. Might try get a sora crank installed instead. Its only 30 squid extra, might be worth it