6 speed freewheel upgrade compatibility?- Mtbr.com
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  1. #1
    mtbr member
    Join Date
    Apr 2019

    6 speed freewheel upgrade compatibility?

    Thanks in advance to any insight here. I picked up the below 20" Trek Precaliber 6 spd used off CL. I have upgraded several areas based off some resources here, not least of which was dropping the fork for a Carbon Chiner.


    Now I would like to make some changes in the gearing. Reason being is two-fold. Mainly to get better options in trigger shifting, but while I'm at it I'd like to increase from 28t to 24t. It is a freewheel setup. I won't be dropping any money into upgrading the wheel set so my thinking now leaves me with the below 2 options. Please let me know what you think. My concern is if I am able to upgrade from 6sp to 7 or 8 on a freewheel, If it is even possible size wise.

    Option 1:


    Pick up this 8 speed freewheel and pair it with a set of 8 spd Shimano Altus Shifter and rear derailleur from the used parts bin. This would be my preferred option, but I'm not sure if it would be compatable.

    Option 2:


    Go with this 7 Spd Freewheel, use the 6/7 spd Shimano Tourney TY300 that is already on the bike along with a Shimano SL-M310 shifter. My guess would be this would be more likely to fit from 6 to 7. It gets him the 34t, but with a jump from 24 to 34.

    Thanks for taking the time to read. Can anyone advise if either of those could be an option for a painless upgrade?

  2. #2
    turtles make me hot
    Reputation: NYrr496's Avatar
    Join Date
    Sep 2008
    I built a Gary Fisher Precaliber for my son when he was small. I built a wheel with a nice old XT hub I had from an older bike and added the 8 speed cassette from the same bike. Worked a treat.
    I guess Id go with the eight speed freewheel to give your child a smoother transition between gears.
    Also look at Trailcraft Cranks. I used em on a cheap 20 inch fat bike my brother bought for his son last Christmas. They were perfect. I was able to use a 26 tooth Wolftooth ring in place of the 36 that came on the bike.
    I put a 9 speed freewheel on that bike. Works great.
    I like turtles

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