How to I find the rear dropout width on this bike?

MikeFairbanks

MikeFairbanks

100 kW
Joined
Mar 9, 2010
Messages
1,385
Location
Atlanta, Georgia, USA
I've looked for stats with no luck.

I'm picking this up for 80 bucks. It's the Walmart Mongoose single speed dirt jumper, and I plan to convert it to electric.

I might just attach my spare 9c front hub motor to it and start riding it right away, but I can't of want to make it an electric motorycle. I want to replace the pedals with pegs and ride it in the dirt down the service roads around here. There are a ton of offroad areas. The legality of it isn't much of an issue. I won't be riding it on the street.

My idea was to put the front hub motor on the back, get it going at 48 or 60 volts, drop the chain and pedals (as mentioned) and just have a fun little dirt jumper (which I actually won't be jumping much.

Here's the bike: It's a steel frame (even though Walmart's site erroneously says it's aluminum) and has 26-inch wheels.

Sorry for droning on and on. My question was: Does anyone know how to find the rear dropout width? (note, I don't have the bike yet, and if it won't suit my needs I don't want to make the 45-mile drive to get it.

Thanks
 
Allow me to utilize my new telepathy scope to take a few measurements. I am kidding, of course.

I am skeptical anyone at wal-mart would know this information. But, maybe you could call the store and speak with the store manager or someone higher up in the chain who would be willing to grab a ruler/tape measurer to get a few somewhat accurate measurements to you. The store manager might be able to hook you up with someone at their store who assembles their bicycles that would be willing to quickly remove the rear wheel and take those measurements you need.

This seems a little devious, but have you tried searching online for a used one so you can ask them this exact question? Get them to take a few measurements on this bike for you.

It might also help to post a product number here or a webpage linking directly to the exact item, maybe someone will visit a wal-mart in the next few days and be capable of finding this bike at a wal-mart to take these measurements. http://www.walmart.com/ip/26-Mongoose-Dirt-Jump-Boys-Mountain-Bike-Teal/22861842 Is this the bike? (aluminum) Sadly, this bike isn't stocked in any of the wal-marts close to myself so I can't do it.
 
There are one or two persons at the bigboxbikes forum who have said before that they assemble bikes at a Walmart. MikeFairbanks might ask there.
 
This one says it is a steel frame.

http://www.walmart.com/ip/26-Mongoose-Beast-Men-s-Oversized-All-Terrain-Bike/22861845?action=product_interest&action_type=title&placement_id=irs_middle&strategy=PWVAV&visitor_id=84326490682&category=0%3A4171%3A133073%3A1085617&client_guid=a52a6f87-7e5e-4f34-a29b-43d250036c4c&config_id=2&parent_item_id=22861842&guid=f57a0f23-cbf9-41ca-9fbf-00c11af273ad&bucket_id=irsbucketdefault&findingMethod=p13n#Item+Description

otherDoc
 
I'm surprised that someone hasn't presented this idea yet, but can't we just assume there's like a 98% chance that it is a standard 130mm dropout? I mean, it's a walmart bike, and so they are designed to readily accept whatever cheap, standard production wheels are available, which means standard 130mm, right? If it was a more expensive or specialty bike there'd be a higher chance that it is using some specialty rear wheel, but at Wallyworld I would have thought it's a safe bet to assume its standard, no?
 
Sorry, guys. I forgot to link to the bike.

It's not a fat bike. It's a dirt jumper. Single speed.

http://www.walmart.com/ip/22861842?wmlspartner=wlpa&adid=22222222227017354748&wl0=&wl1=g&wl2=c&wl3=40334806592&wl4=&wl5=pla&wl6=78295021712&veh=sem

I wonder if a front hub motor could fit a 135mm dropout (if that's what it is) with a slight amount of bending. Like I mentioned, no chainring or chain needed, just the motor. It will essentially be an electric motorcycle (but at about 30mph). Just for commuting on the dirt paths to work (off road pretty much the entire way if I choose to go that route) and horsing around.

It's actually being sold to me (if I go get it) by a pawnshop that advertised on Craigslist. For eighty bucks it can't be that bad.

And it's definitely 100% steel. The only part that's aluminum is the advertisement.
 
Sweet! Thanks, Mark.

114 is perfect. It should easily fit a front hub motor.

For the sake of argument (or option), is it possible to put a freewheel sprocket onto a front hub motor for use in the back (just in case I wanted to pedal)?

If not, no big deal.

What I mostly want is a dirt bike that's dirt cheap (this one fits the bill), can take a beating (steel can do that) and will get up to about 30mph max as I blast down the dirt service roads to work. As long as it can go about five miles on a charge I'm good. The lighter the better.
 
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