How much to replace a crankshaft?
08-16-09 | 12:42 PM
#1
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From: Ocean grove NJ
How much to replace a crankshaft?
A neighbor gave me a used Murray Biotech bike a few years ago. It’s my bad weather bike, I ride in the rain and snow and during the winter I usually ride at night when I get home from work. It’s not the best bike in the world, but I find it very comfortable to ride. The crankshaft went on me and I trying to decide if it’s cost effective to replace it. The rest of the bike is in decent shape.
About how much would it cost for a LBS to replace the crankshaft?
About how much would it cost for a LBS to replace the crankshaft?
08-16-09 | 01:27 PM
#2
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From: Middle Maine
Bikes: 2014 Surly LHT, 2003 Giant NRS 3, 1991 Trek 7000, 2022 Surly Bridge Club, 1985 Miyata 210, 1999 Schwinn Moab 2
What do you mean, exactly, when you say crankshaft ? Do you mean that one of the crank arms is broken, or do you mean the spindle shaft that the crankset is mounted to ?
Either way, having an LBS fix it would probably cost more than the bike is worth. If it was mine, I'd find a donor bike, either a five dollar yard sale bike, or a junker from the scrap pile, and I'd fix it myself.
Sheldon Brown's website will help you learn how to do it yourself.
Either way, having an LBS fix it would probably cost more than the bike is worth. If it was mine, I'd find a donor bike, either a five dollar yard sale bike, or a junker from the scrap pile, and I'd fix it myself.
Sheldon Brown's website will help you learn how to do it yourself.
Last edited by grinningfool; 08-16-09 at 01:33 PM.
08-16-09 | 01:32 PM
#3
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From: Ocean grove NJ
The shaft itself seems OK, it's the spindle that it's mounted to that's broken.
08-16-09 | 01:41 PM
#4
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From: Middle Maine
Bikes: 2014 Surly LHT, 2003 Giant NRS 3, 1991 Trek 7000, 2022 Surly Bridge Club, 1985 Miyata 210, 1999 Schwinn Moab 2
It's a simple repair, but you need the right tools. And you need a new spindle, though, like I said, I'd scavange one off a junk bike.
You need a crank puller, and the bottom bracket tools, which are likely a pin spanner, and a lock-ring spanner.
Again, check out Sheldon's site for instructions.
You need a crank puller, and the bottom bracket tools, which are likely a pin spanner, and a lock-ring spanner.
Again, check out Sheldon's site for instructions.
08-16-09 | 03:47 PM
#5
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From: Shady Pines Retirement Fort Wayne, In
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OK I have a question well several actually. are you call the part that goes through the bike the SPINDLE? if so what part are you call the SHAFT? is the part actually broken (like in two pieces) or is it just real loose and wobbly?
does this bike a have a one piece crankset or a three piece? can you post a pic?
does this bike a have a one piece crankset or a three piece? can you post a pic?
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
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“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk
08-16-09 | 06:45 PM
#6
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From: Ocean grove NJ
I found a picture of it in Sheldon Brown's glossery, under Bottom Bracket it's the Ashtabula one piece crank. The crank itself (the part that the pedals are attached to) seems fine, it's very loose and flosts around, I think it's the bracket that holds the crank in place that's shot
Last edited by ChrisOG; 08-16-09 at 06:51 PM.
08-17-09 | 02:13 AM
#7
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From: Mesa, AZ
Bikes: Moots RCS, tandem, beach-cruiser, MTB, Specialized-Allez road-bike, custom track-bike
There's no bracket that holds the crank in place. It's the two cups, bearings and cone on each side that holds the crank in place.
Post a picture and point to the area that you think is loose.
Post a picture and point to the area that you think is loose.
08-17-09 | 07:22 PM
#8
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From: 25 miles northwest of Boston
Bikes: Bottecchia Sprint, GT Timberline 29r, Marin Muirwoods 29er, Trek FX Alpha 7.0
I have a $250 hybrid which I've put easily another $200 into. I love the bike but wore out the drivetrain and just replaced the chain; rear cog, and now the BB (bottom bracket). It was $30 for the "overhaul" and another $30 for the BB. The bike will now be ready for another 1,000 miles and I'm glad to pay it.
10-08-19 | 04:56 AM
#9
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From: Milwaukee, WI
Bikes: '68 Raleigh Sprite, '02 Raleigh C500, '84 Raleigh Gran Prix, '91 Trek 400, 2013 Novara Randonee, 1990 Trek 970
I recently have to repair the crankshaft of my car. Perhaps the price is about the same. There are fairly accurate information on the crankshaft repair cost on this website.
