Trek Superfly 20 Upgrades-
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  1. #1
    mtbr member
    Join Date
    Dec 2007

    Trek Superfly 20 Upgrades

    A friend gave me a hand me down Trek Superfly 20 for my 5yo son. I finally got all the parts needed to upgrade it how I planned. Here's the upgrade list:

    Wheels: MEROCA (Ailexpress)
    Tires: Goodyear 20x2.2
    Cassette: Sram PG1090 (11-28)
    Chain: Sram PC1030
    Derailluer: Sram Red (used)
    Shifter: Sram GX 10spd
    Cranks: Truvativ IsoFlex - DIY shortened to 125mm
    Chainring: North Shore Billet 28t narrow wide 64BCD
    BB: Ti square taper (Aliexpress)
    Bars: Bontrager RXXXL carbon
    Stem: Wake 35mm (Amazon)

    The stock bike weighed around 19.5lbs. I don't have a bike scale but I'm really interested to know what the weight is now. I'll follow up after the next time I run by the shop and weigh it.

    I thought about the gearing and crank length a ton. Now that I have the thread taps I can just pick up a cheap set of used cranks from the local community bike shop and make new cranks as he grows. The 11-28 with 28t ring has been great. We ride a mix of trail and around town (to school and downtown). He can climb most hills he has the courage to try and other long climbs we use a tow strap. I've also got a 26t and 30t ring I can throw on there if he needs something different.

    Other upgrade considerations:
    Lighter tires
    Lighter pedals
    Alloy headset
    Carbon fork (although I can't find one that is much lighter then the stock alloy)

    Trek Superfly 20 Upgrades-superfly1.jpg

    Trek Superfly 20 Upgrades-superfly2.jpg

    Trek Superfly 20 Upgrades-superfly3.jpg

    Trek Superfly 20 Upgrades-superfly4.jpg

  2. #2
    mtbr member
    Join Date
    Feb 2008
    Quote Originally Posted by kylerodland View Post
    I don't have a bike scale
    Cheap digital fish scales make great budget-friendly bike scales. You can find them for $10-15 on Amazon all day long.

    Nice bike!

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