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Modern Schwinn Adult Tricycle Crank Needed

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Modern Schwinn Adult Tricycle Crank Needed

Old 04-04-11, 03:34 PM
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tpelle
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Modern Schwinn Adult Tricycle Crank Needed

At work we bought eight inexpensive Schwinn adult tricycles from WakMart (not my choice - I wanted to hold out for Worksman) to use for transportation inside the plant.

https://www.walmart.com/ip/Schwinn-Me...icycle/5679542

One of our employees and hid dad volunteered to put them together. Unfortunately, on one bike (so far, anyway) they managed to swap the pedals, and cross-threaded the right pedal to the left crank! (I presume that they also cross-threaded the left pedal to the right crank, but it hasn't fallen off yet.)

Is anyone familiar with the style of crank used? Where can I get a set of replacement cranks?
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Old 04-05-11, 05:02 AM
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dabac
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First you should try ordering a replacement where you bought the bikes. Even a big box store should offer some customer service.
The quality of the pic in the link is so poor that identifying the crank has quite an element of guesswork in it. I'll say it's a 3-piece, square-taper design but I could be wrong. If I'm right, then pretty much any square taper crank should fit. You need to try to match tooth count and chain line, either by sourcing a "single" crank, or getting a double and using the inner chainring, which should be close enough.
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Old 04-05-11, 05:09 AM
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i'll probably get flamed by some self righteous person saying people like me are why the world is going to ****, but perhaps you should simply try to exchange it at walmart. Another option would be just suck it up and go buy another one. I can almost guarantee you that those things will eventually start having problems and need to be fixed, couldn't hurt to have an extra one on hand for parts.
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Old 04-05-11, 10:46 AM
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Pay your Local Independent Bike shop the Money it takes to change
what you don't like about the bike you got elsewhere.
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Old 04-05-11, 11:02 AM
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Looks to me like it's one of the dirt cheap and heavy one piece "Z" forged/bent steel cranksets such as found on some BMX bikes.

Either way there's some specialty tools needed to change out the crank arm set. The best bet would be to take it to a bike shop. I suppose you COULD ask if they have a service guy at Wally's that could do the job. But I suspect you'll just get a confused look in return at the term "service guy". A bike shop will have the specialty tools and skills and likely the part on hand to do the switch over.
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Old 04-05-11, 01:27 PM
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I know that these are pretty cr@ppy bikes, but they only have to last 6 to 9 months. Then the job is done, we all fly home, and either abandon the bikes, sell them to the customer for scrap prices, or donate them to Goodwill or someplace.

There is exactly ONE LBS in town. I'll try to get over there this weekend and talk to them about it. It looked like there was some sort of special tool involved, and hopefully he has one.
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Old 04-05-11, 06:39 PM
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It's been awhile since I assembled one of those, but I believe that it is a square taper three piece crank.

One area to check is the chain alignment. If the chains (there are two) are not parallel, you will wind up breaking the rear chain. Alignment can be checked with a straight edge.
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Old 04-06-11, 09:00 AM
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I finally found one of the manuals, and yes, it is a square taper crank. I looked again at the stripped crank, and it turns out that the pedals were assembled to the proper side - I was mistaken on that. I talked to the guy who assembled the bike, and he said that he didn't have a wrench thin enough to get a good "bite" on the pedal, so they may not have been tightened to the degree necessary. I guess this one just wasn't tight enough and managed to get loose enough to strip. There are no threads left in the crank.

I think I'll bring in my wrenches and give the pedals on the other bikes a good tightening.

Now I've got to figure out how to haul this stupid bike to the LBS - it's too big to fit in my car.
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Old 04-07-11, 10:24 AM
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Well, it turns out that this may not be much of an issue. I stopped by the one and only LBS in town - White's Bikes in Moreno Valley, CA https://www.whitesbicycles.com/ and spoke to who turned out to be the owner. It turns out that he can order a replacement crank once I remove the stripped one. He also explained how to remove the old one, and sold me the crank puller tool to get the job done. When I got to work this morning the first thing I did was remove the old crank- the tool worked perfectly! I'll stop by tonight and show him the crank so he can the new one ordered. Probably about $20.00 or so for the new crank, he said, plus the $11.00 for the tool, and I'll get the bike back in service.

Best part of this deal is that I was able to expense the tool, which will now end up in my tool bag!
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Old 04-07-11, 10:33 AM
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Originally Posted by tpelle View Post
I know that these are pretty cr@ppy bikes, but they only have to last 6 to 9 months. Then the job is done, we all fly home, and either abandon the bikes, sell them to the customer for scrap prices, or donate them to Goodwill or someplace.

There is exactly ONE LBS in town. I'll try to get over there this weekend and talk to them about it. It looked like there was some sort of special tool involved, and hopefully he has one.
Actually those Meridians may surprise you. If they are set up and dialed in right they will last quite awhile. I have the Town & Country witch is the 3 speed version and I have over 620 miles on it. It's still going strong lugging my rotund butt and a 25 Lbs plus of Groceries.
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Old 04-08-11, 01:54 PM
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Stopped by White's Bikes yesterday afternoon and they had a replacement crank in stock for $21.95. It was black instead of polished, but what the heck. I got it on the bike this morning - only took a couple of minutes - and I'm riding it today!

One more step forward in my bicycle knowledge!
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