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  1. A relic of the days before narrow wide chainring technology. Bc there’s only one chainring in the front the rollers just keep the chain from falling off when it flips around. These were popular on downhill bikes but probably installed so that if a kid were riding the bike they would have less of a chance of getting stranded

  2. Small geared kids bikes usually have terrible chain lines because of the super short chain stays. Keep them on to keep the chain from coming off.

  3. LowerSlowerOlder on

    If you want to remove it, you could replace the chainring with a narrow wide chainring, but that means new cranks also. Hot Rocks can be good for little shredders, so it might be worth it if they aren’t going to outgrow it in a week or two.

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