Bike repairs...
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Bike repairs...
Postby bigmark100 » Wed May 02, 2007 3:24 pm
Apparently the crankshaft is worn. So a broken chains gonna cost me close to $500 - its a Shimano 105.
Do I trust the shop and go ahead with it? Or should I get a second opinion.
and any idea of how easy it is to replace these bits yourself?
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Postby sogood » Wed May 02, 2007 3:33 pm
Running gears do wear down and require replacement over time, so what's said is a real possibility.
As for the front, it may be cheaper or not to just replace the chainrings.
In general, a cassette will last at least two sets of chains if the chain is changed within its spec life. Once over that, it'll wear out the cassette and the chainring. Sounded like your running gears have had a long life already.
Doing it yourself is not hard but you'll need some specific tools which probably will equate to the labour charge for the job.
RK wrote:And that is Wikipedia - I can write my own definition.
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Postby mikesbytes » Wed May 02, 2007 3:56 pm
I go thru a cassette every 9 - 12 months, chain every 6 months and front chain rings every 2 years.
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Postby bigmark100 » Wed May 02, 2007 4:06 pm
Ive had the bike for 3 years - but riding only regularly in the last 18 months. milage is about 2-3 thousand kms....
I am happy to have it replaced - if its from normal wear and tear, but fairly new to having a decent bike and having it serviced...etc.
just wanted to be sure Im not being taken for a ride......
I guess Im in shock - going in thinking I only need a new chain when it turns out be so much .
thanks for the responses...
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Postby sogood » Wed May 02, 2007 4:18 pm
RK wrote:And that is Wikipedia - I can write my own definition.
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Postby Richardwestmelb » Wed May 02, 2007 4:32 pm
Get another shop to have a look.
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Postby Halfanewb » Wed May 02, 2007 5:06 pm
You may be able to compare the teeth on the lesser used gears on the cassette to get some indication of wear on the most used ones.
Is there any play in your cranks? grab the pedals and try and move the crank vertically up and down, im no expert but the crankshaft is a harder metal than the bearings, so its the bearings that should be worn out if there is any play. And if there is play there is allways the chance that it might just need a minor adjusting or replacing the bearings.
$500 is a lot of cash - take a peek at these prices, check out this Cassette, this Chain and this 105 Chainset from Probikekit, most orders have a postal time to aussie of 7 days.
Chainsets can last upwards of 10,000k with proper maintenance, so on first impressions I would be very sceptical of this guy at the bike shop, but then im making that judgement based on the info your giving us
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Postby pugsly » Wed May 02, 2007 6:29 pm
I guess it has a bit to do with the quality of the components, but is the difference that marked?
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Postby beauyboy » Wed May 02, 2007 8:21 pm
I would be goin past another shop and getting another quote and advice. What type of bike do you ride?
How do you ride?
How often do you oil your chain?
I just had a Look at my Discovery which has now been retired as I upgraded. It has covered a similar distance and while the Cassette and Chain rings are showing wear they are not to the point of replacement.
To me 500 is excessive for the short distance that you have covered, so brings me back to my first question, What do you ride?
Donald
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Postby mikesbytes » Wed May 02, 2007 8:47 pm
Figures will vary considerbly depending on the rider, the conditions being ridden in, how vigours you are with cleaning it and the quality of the equipment.pugsly wrote:Just to hijack this thread slightly, what sort of life would you expect to get out of the 'wearable' components on a bike, the chain, cassette, bearings etc? I don't expect to wear anything out anytime soon, but in a way, it would be nice to be doing that much riding.
I guess it has a bit to do with the quality of the components, but is the difference that marked?
For me, it seems that I get 3-6,000k out of a chain, 6-12,000k out of a cassette, 12,000k out of the big ring and 24,000k out of the small ring.
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Postby mikesbytes » Wed May 02, 2007 8:52 pm
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Postby Mr888 » Wed May 02, 2007 10:19 pm
He described it to me as changing your oil in your car without changing the oil filter and vice versa also.
...BUT at $500, that's a huge ask! A good chain should be around $40 and rear cassette $130 plus fitting. (You could get cheaper gear off eBay if you're handy). I'm not sure how much chainrings are (but don't think you'll need to change the cranks themselves), but estimate no more than $100. That's should be around only $270 for the parts. I don't think it's $230 worth in labour.
Can anyone second my opinion?
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Postby sogood » Wed May 02, 2007 10:26 pm
RK wrote:And that is Wikipedia - I can write my own definition.
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Postby bigmark100 » Thu May 03, 2007 9:48 am
I've asked them to give me the old parts so I can have a proper look at whats actually worn. I'll post some pics up if anyone is interested.
The crank is going to cost $280, the cassette $99 and chain $49.
I guess an hour or two in labour is going to hit pretty close to $500 mark.
They did explain how the chain stretch, would mean that a new chain would not sit well on the old cassette.
Unfortunately when the chain broke - on a trip, I had nowhere to put it so just binned it. big mistake,
The crank was a suprise.
The bike I have is a Kona - Jake the Snake.
I ride daily - 15kms to work.
Quite a hilly ride - and do stand up and stress the bike out on the hills.
(Im 90kgs)
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Postby bigmark100 » Thu May 03, 2007 9:49 am
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Postby europa » Thu May 03, 2007 10:04 am
I've stayed out of this because I'm new to the fragility of modern parts, something that's only going to get worse as we keep adding more gears and being forced to use lighter and thinner chains.
Theoretically, if you change your cassette, you should fit a new chain because a stretched chain is only going wear your new cassette faster than a new one - but it's not going to kill your new cassette. The old theory was that a chain is cheap, but at $50 for one, they aren't cheap.
You do NOT have to replace your cassette when you change your chain, only when the cassette is worn and, as described above, that's checked by looking at the teeth on the cogs. I would regard two chains per cassette as cautious but considering the miles covered, not overly cautious.
What does the shop mean by 'the cassette getting stretched'? That's a new one to me.
A chain does not STRETCH - it flamin' can't. What happens is that the pins wear, allowing slop in the sideplate/pin bearing (often just a hole but not necessarily) which has the effect of allowing the chain to be longer when under tension. Yes, a worn chain will increase the rate of wear on your cassette.
How the hell does a crank wear out? Wasn't it done up tight? Did you feel it moving when you applied power? Was it creaking and making noises? Even then, just tensioning it properly should fix it unless you've let it go too long (in which case the movement will mess it up).
Look, the shop might be right in what it's saying. We can't say, but a lot isn't adding up with this story. It could be that you've just learned some valuable lessons about bike maintenance, it could also be that you've been taken for a ride. Mate, ask lots of questions and get them to explain everything - don't be aggressive or rude, because it could be you've missed some pointers in looking after your bike, but also have your bulldust detector set to 'sensitive' because you may find yourself changing shops.
I feel for your financial pain, but look at it this way, your bike, which you obviously enjoy, is having a birthday
Richard
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Postby mikesbytes » Thu May 03, 2007 11:09 am
Some people use 2 or more chains and swap them every time they clean the chain.bigmark100 wrote:the bike shop also told me that if you want to prevent the cassette from being streched, then you should change your chain every 3 months.
9 speed chains are something like $20 mail order. check out www.torpedo7.com.au
BTW, nine speed mtb chains are identical to nine speed road chains.
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Postby sogood » Thu May 03, 2007 11:49 am
With that message and your 15km/day commute, I would conclude that LBS is a con shop! Unless they put on some crappy quality chains and you ride in the rain everyday, there's no way you'll need to replace chains after 1500km.bigmark100 wrote:the bike shop also told me that if you want to prevent the cassette from being streched, then you should change your chain every 3 months.
Sorry to hear the major expenditure and I would suggest that you keep all the parts (as they may be reused or sold off on eBay). And yes, it would be good to post some closeup photos.
BTW, what's the name of that LBS? We should all know about it and avoid it.
RK wrote:And that is Wikipedia - I can write my own definition.
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Postby bigmark100 » Thu May 03, 2007 12:07 pm
I've got a friend coming in to the shop with me who knows more about bikes mechanics and can check their story.
will keep you posted.
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Postby europa » Thu May 03, 2007 12:38 pm
That's always the danger when you don't know what the bloke's talking about - misunderstanding and thinking you've been ripped when you haven't been. Mind you, better communication from the shop would help. Suck it and see.bigmark100 wrote:I wont name and shame until Im sure I was ripped off.
I've got a friend coming in to the shop with me who knows more about bikes mechanics and can check their story.
will keep you posted.
Best of luck
Richard
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Postby bigmark100 » Fri May 04, 2007 2:54 pm
ok - ive got my bike back, and still not really sure if Ive been ripped. total cost is $580. From what the mechanic showed me - there was wear with the threads within the crank, and I could concur that it needed replacing. The BB was thrown out so they were unable to show me the wear on this.
The replacement crank is a Shimano Crank 105 Compact 170mm.
The cost is $365. plus the BB - $75, The cassette is 9sp - 12/
12/23. $55 bucks.
I've tried finding the parts they have fitted on the internet - to verify the cost of them. but have not had much luck identifying them.
Is anyone able to tell me if Ive been over charged for these parts? Esp - the crankset. Which does seem very steep.
The code on the crankset says SG-X 105 60F.
thanks
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