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GMC Yukon - Kent 52618

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GMC Yukon - Kent 52618

Old 12-30-17, 12:53 PM
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GMC Yukon - Kent 52618

I decided to purchase a GMC Yukon spec'd by Kent, should arrive today. After looking at many of the low cost options that are available, the basic reasons for selecting this one are:

- Cheapest aluminum frame fat bike available - $321 delivered
- BB width of 120 mm and rear spacing at 197 mm

I see this as a platform for upgrade as needed. The first steps will be to break it down, clean, lube and adjust everything. Tires will be removed and replaced with Origin8 Tsunami 4.9's set up tubeless.

Attached are other specs, any advice is greatly appreciated!
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Last edited by pcf; 01-02-18 at 09:12 PM.
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Old 12-30-17, 10:12 PM
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Never heard of 120 mm BB until today. Most are 100mm.

It never is economical to buy a new bike and upgrade a lot... cheaper to buy the bike close to what you want to begin with.

This is basically a bigboxstore bike and you are best off not upgrading anything. All gearing will be limited by the freewheel design unless you replace the hub. That being a freewheel likely will bend the axle. high-tensile steel fork may break off-road (as opposed sot cro-Mo steel forks).

I don't think the rims and tubes can be made tubeless reliably.

My best advice is to send it back if that is possible. Sorry, I don't mean to ruin your day, but the bibgoxstore bikes really are not good, and also not good for upgrades in economical ways. Just ride it as is and if you get fed up, buy a better one.

BTW, there is a bigboxbike forum I came across recently. I'm impressed with what some people do to and with their bikes. Some are not 100% bad, but yous till get what you pay for.

Last edited by HerrKaLeun; 12-30-17 at 10:26 PM.
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Old 12-30-17, 11:33 PM
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Guess I'd ask what your end game was. If it is nothing but a fun project, have a blast! If it is an economical build, I don't see any way you get to something even to Framed quality without spending at least Framed money. I mean, even by cheapest prices you are dropping another $150 on tires, you are already to used decent Motobecane prices by me, and right around new ones on Bike Island.
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Old 12-31-17, 10:39 AM
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Originally Posted by pcf
I decided to purchase a GMC Yukon spec'd by Kent, should arrive today. After looking at many of the low cost options that are available, the basic reasons for selecting this one are:

- Cheapest aluminum frame fat bike available - $321 delivered
- BB width of 120 mm and rear spacing at 190 mm

I see this as a platform for upgrade as needed. The first steps will be to break it down, clean, lube and adjust everything. Tires will be removed and replaced with Origin8 Tsunami 4.9's set up tubeless.

Attached are other specs, any advice is greatly appreciated!
A very interesting and affordable way to feed my fat bike fixation.
Can you link me in to who makes it? The specs say that bike fits riders up to six feet.
I am six two. I wonder if they make bigger bikes,
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Old 12-31-17, 11:59 AM
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Originally Posted by PdalPowr
A very interesting and affordable way to feed my fat bike fixation.
Can you link me in to who makes it? The specs say that bike fits riders up to six feet.
I am six two. I wonder if they make bigger bikes,
Cheap yes, affordable no if you count in the soon replacement or necessary upgrades.
unless you have no hills, sand or snow, the 1x7 will get you stuck.
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Old 12-31-17, 01:37 PM
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Originally Posted by HerrKaLeun
Cheap yes, affordable no if you count in the soon replacement or necessary upgrades.
unless you have no hills, sand or snow, the 1x7 will get you stuck.
A valid point.
It all depends on the cost of the upgrades.
I am pretty good at harvesting good used parts.
What kinds of bikes would have better than that 1 X 7?
At this time I am not knowledgable enough to know what the right parts are.
I am still checking around on what will be my winter bike.
The more I ask the more experienced people can tell me.

So far I don't even know if they make a 20 inch.
I am still trying to find the company website as well.

Last edited by PdalPowr; 12-31-17 at 01:59 PM.
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Old 12-31-17, 03:35 PM
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Frame and components look pretty good.

Pedals are one piece Al castings. Seatpost is 27.2, I will replace it with a longer alloy one.
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Old 12-31-17, 03:57 PM
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Originally Posted by PdalPowr
A valid point.
It all depends on the cost of the upgrades.
I am pretty good at harvesting good used parts.
What kinds of bikes would have better than that 1 X 7?
At this time I am not knowledgable enough to know what the right parts are.
I am still checking around on what will be my winter bike.
The more I ask the more experienced people can tell me.
So far I don't even know if they make a 20 inch.
I am still trying to find the company website as well.
Pretty much every bike not from Walmart or other big box store. cheap ones ($500) have 2x8, expensive ones 1x11, or 2x10 etc.

Obviously if you can get "free"parts the upgrades may be manageable, but stripped parts may not necessarily really good or compatible. Fatbikes are new and had changing standards, so it will be hard to already have a large number of free donor bikes with good parts.

Originally Posted by pcf
Frame and components look pretty good.

Pedals are one piece Al castings. Seatpost is 27.2, I will replace it with a longer alloy one.
When the seatpost is too low this is usually a sign the bike is too small for you

Last edited by HerrKaLeun; 01-01-18 at 10:28 AM.
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Old 01-01-18, 09:51 AM
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As others have mentioned the bike has limitations, like the 1 x 7 drivetrain. The only upgrade I would recommend is new tires as they will have a major impact on the ride. I put $250 worth of tires on a $500 bike and it was a good investment. I wouldn't worry too much about the people who tell you to spend more money, more money will get you a better bike but you already knew that and made a decision.
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Old 01-01-18, 10:53 AM
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Thanks Buffalo!

The only upgrades I am doing now are to install a longer alloy seatpost and Origin8 Tsunami 4.9 tires mounted tubeless.

End result will be an 120/197/150 spaced aluminum frame fattie with decent tires. For less than $500.

I’m OK with the 1x7. I’ve converted my road bikes to 2 or 3 speed IGH. But if I could find a reasonably priced 190 mm internal gear hub . . .

Last edited by pcf; 01-02-18 at 09:13 PM.
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Old 01-01-18, 11:04 AM
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I say ride it, until it fails, then decide if you want to upgrade.
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Old 01-01-18, 11:32 AM
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Originally Posted by pcf
Thanks Buffalo!

The only upgrades I am doing now are to install a longer alloy seatpost and Origin8 Tsunami 4.9 tires mounted tubeless.

End result will be an 120/190/150 spaced aluminum frame fattie with decent tires. For less than $500.

Iím OK with the 1x7. Iíve converted my road bikes to 2 or 3 speed IGH. But if I could find a reasonably priced 190 mm internal gear hub . . .
Keep the old seatpost so you don't have to give away your new one when you sell this. Same for other upgrades you may make.... for most bikes grips, saddle and possibly pedals are upgrades since those are personal preference parts, not necessarily good or bad ones.
IGH may cost more than the bike, and not sure if they withstand the abuse off-road in a fatbike? and since you already did that, requires re-lacing the wheel, may as well built a new wheel with tubeless rims. but at that point you really should buy a new one.... unless this is just for fun (isn't all on this forum?)
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Old 01-01-18, 08:59 PM
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Looking forward to seeing how your conversion to tubeless goes. I bet you will lose close to 2 pounds.
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Old 01-02-18, 08:03 AM
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What's the supposed advantage of 120mm BB vs. standard 100 mm? Seems all fatbikes have 100 mm and still can accomodate 5" tires. Is that something for the supposed 6" tires? I imagine Q-factor being wide for 120mm BB.
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Old 01-02-18, 09:16 PM
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Originally Posted by HerrKaLeun
What's the supposed advantage of 120mm BB vs. standard 100 mm? Seems all fatbikes have 100 mm and still can accomodate 5" tires. Is that something for the supposed 6" tires? I imagine Q-factor being wide for 120mm BB.
Just one of the factors I considered when looking at low cost fat bikes.

Wider rear axle and BB is better if tires get even fatter.

Last edited by pcf; 01-03-18 at 12:29 PM.
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Old 01-03-18, 12:28 PM
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Big weight reduction with the tire change according to these numbers:
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Last edited by pcf; 01-06-18 at 10:23 PM.
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Old 01-04-18, 04:19 PM
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13# in tires and tubes?
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Old 01-06-18, 09:03 PM
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New Origin8 Tsunami 4.9 tires easily set up tubeless with the stretch wrap procedure.

Rides great!
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Old 01-07-18, 08:58 AM
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Originally Posted by pcf
New Origin8 Tsunami 4.9 tires easily set up tubeless with the stretch wrap procedure.

Rides great!
That is a serious looking ride you have there.
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Old 01-10-18, 01:01 PM
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I set up another one of these for my wife, this one has Origin8 Tsunami 4.0 120 TPI folding bead tires mounted tubeless.

As pictured, hers is 33.8 lbs.

These bikes have a lifetime frame and fork warranty.
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Old 01-15-18, 12:13 PM
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Chain clearances in first gear with 4" and 4.9" tires.
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Old 01-15-18, 12:48 PM
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Originally Posted by pcf
Chain clearances with 4" and 4.9" tires.
Yes but,where is the snow?

I am just envious thats all.

One day I will pull the trigger.
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Old 01-16-18, 09:11 AM
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Originally Posted by PdalPowr
Yes but,where is the snow?
Everywhere around here.
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