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8/19/2016 2:39 PM

I just got a Sunday model c yesterday and put it together. Rode it around for 10 minutes right away and it was fine. Went back out a few hours later for a longer stretch and during the ride I realized the rear wheel had tension on it.

At first I realized the left brake pad was rubbing on the rim so I disconnected the brake and realized the actually problem was the axle had slid forward in the dropout and the tire was running the frame.

Now I haven't been into BMX since my freshman year in highschool, but want to get back into it. These new "slammed" rear ends are new to me and there is so little tolerance for play in that rear wheel. If I pull the wheel back far enough to clear the frame. The chain is too tight. If I leave enough slack in the chain the tire hits the frame.

Any suggestions? I put another link in the chain and that sets the axle too far back in the dropouts. I can only think of chain tensioners which I don't know if they'd solve my problem or a slimmer tire which I don't really want to do.


8/19/2016 3:25 PM
Edited Date/Time: 8/19/2016 3:28 PM

There are a few options.

1. Get a 1/2-link and put it in your chain. It's exactly what is sounds like. One half-link is simply half the length of a full-link. By simply connecting one half-link bit, you might be able to get that sweet spot between too tight and too lose. Just perfect.

2. Slimmer tire, although you don't want that. A benefit to this is when your wheel becomes off-centered, the tire is slim, so it's less likely to rub, meaning you sometimes won't need to immediately fix it if you don't have tools.

3. Probably the best option, crank the heck out of the wrench and tighten them bolts! I use lock washers in place of the regular washers for my setup, my rear wheel hasn't moved in months. I don't run pegs often, but is works well.


Scooter kid trying to ride a bike.

8/19/2016 3:33 PM

Did you adjust the non drive side as well, to get the wheel central?


8/19/2016 5:24 PM

Oh yeah it was centered. It's obviously a complete from Sunday and I think the wheels a tad off of true but it's not terrible. Does anyone have a suggestion for chain tensioners for short dropouts?


8/19/2016 6:25 PM

grumpySteve wrote:

Did you adjust the non drive side as well, to get the wheel central?


When you loosen the wheel, DO BOTH SIDES. Then you can center it better.

Don't worry about all the other things mentioned until you try this. (It's the free option)


"Hey anybody ever make that mistake like right when you wake up in the morning and you believe in yourself?" -Kyle Kinane

"BIKES!" -Tom Segura

8/20/2016 10:35 AM

I loosened both sides of the wheel and centered it the best I could. I ordered 2 demolition tensioners and a half link. Hopefully I'll have the problem fixed when those get here


8/20/2016 11:10 AM

If the bike worked when you got it, it isn't broken.

You just have to center the wheel correctly.

Unless you have bent the rim already. If so, tensioners won't fix the issue.


8/20/2016 11:15 AM

I guess the wheel could be a bit out of dish, so when the rim is centred the hub isn't, causing the axle to sit a little crooked. That would cause the wheel to want to move itself to get the axle/ hub centred and make the rim not centred. You should be able to tighten one side and the wheel be perfectly central (rim and hub). But there's all kinds of tolerances to take into consideration so isn't always the case