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  1. #1
    Senior Member frymaster's Avatar
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    "rocket track" chainring -- crap or not?

    i'm in the process of cross-grading my drivetrain to 1/8" and have found this neat looking chainring, the "rocket track". it's here:

    http://wheelandsprocket.com/itemdetails.cfm?id=7130

    according to the ad copy it has "10 drilled holes- making it compatible with virtually all cranksets!", which sounds appealing since i have a 110bcd crank that i'm fond of.

    so... my question is: has anyone used this or know anything real about it? is it worth my effort and money to get this thing?
    "Let's try and keep the constructive answers in the commuting forum." --SheistyMike

  2. #2
    Senior Member GregLast's Avatar
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    I've been using one for a few months now. I'd call it reliable. I'm happy with it. I'll buy another if I want to change my gearing. I'm buying one for my wife's bike.

  3. #3
    jack of one or two trades Aeroplane's Avatar
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    Far from "quality goods" but it keeps my bike moving.
    Quote Originally Posted by Dr Irwin Goldstein
    Men should never ride bicycles. Riding should be banned and outlawed. It is
    the most irrational form of exercise I could ever bring to discussion.

  4. #4
    Packfodding 3 caloso's Avatar
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    Is that the same Rocket Ring that Harris Cyclery has been selling for years now? I have a couple. They're good value in my opinion.
    Cyclists of the world, unite! You have nothing to lube but your chains!

  5. #5
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    They're fine. I used to have one, but it was too small. They don't make one in 52, or that's what I'd be using. My cranks are 110 bcd, so they're a great solution for me otherwise.

  6. #6
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    Like someone has said, they're not top quality, but they make your bike move...

    It came straight and has stayed straight, very quiet, minimal wear so far with a couple hundred miles..

  7. #7
    Packfodding 3 caloso's Avatar
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    They are kind of ugly, though.
    Cyclists of the world, unite! You have nothing to lube but your chains!

  8. #8
    Senior Member frymaster's Avatar
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    Quote Originally Posted by matt wisconsin View Post
    It came straight and has stayed straight, very quiet, minimal wear so far with a couple hundred miles..
    i suppose that's what i can ask for for $25.
    "Let's try and keep the constructive answers in the commuting forum." --SheistyMike

  9. #9
    Senior Member mihlbach's Avatar
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    I used a rocket chainring for several thousand miles...mine was fine but it wore faster than other chainrings I have used. It also didn't fit on my Shimano cranks correctly and I had to spend a couple hours with a dremel tool getting it to fit right. Others have reported similar problems.

    Salsa chainrings cost the same but are made of 7075 aluminum, rather than 6061, and last longer. Go with a Salsa. They are 3/32" but will work just as well with 1/8" drive train.

    http://www.webcyclery.com/product.php?productid=17150


    On the other hand, if you really want a long lasting chainring, go with a steel Surly ring. It'll cost about double, but should last 3 times as long as an aluminum ring.

    Good Luck!
    Last edited by mihlbach; 08-20-08 at 12:47 PM.

  10. #10
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    +1 on the surly

  11. #11
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    would these work with 3 bolt cranks? i know i should replace them but its not my decision

  12. #12
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    Quote Originally Posted by mihlbach View Post
    I used a rocket chainring for several thousand miles...mine was fine but it wore faster than other chainrings I have used. It also didn't fit on my Shimano cranks correctly and I had to spend a couple hours with a dremel tool getting it to fit right. Others have reported similar problems.

    Salsa chainrings cost the same but are made of 7075 aluminum, rather than 6061, and last longer. Go with a Salsa. They are 3/32" but will work just as well with 1/8" drive train.

    http://www.webcyclery.com/product.php?productid=17150


    On the other hand, if you really want a long lasting chainring, go with a steel Surly ring. It'll cost about double, but should last 3 times as long as an aluminum ring.

    Good Luck!
    I may be wrong but in my experience 3/32 chainring with a 1/8th chain is a bad idea. I was doing this for awhile and it totally destroyed my chainring. Not to mention that you get horrible power transfer due to the fact that the chain has so much side to side play on it.

    Also that side to side play overtime can make your chainring weaker, and on larger size chainrings it can make them fold. Happened to my friend.

    if your set on a 3/32 chainring just get a 3/32 chain and 3/32 cog.

    but @ 25 dollars those rockets seem alright.
    St-Stuntin is a habit

    Boulder Fixed Gear

  13. #13
    Senior Member
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    I have one, it goes round just like my other chain rings. No complaints. The option of using it on 110bcd or 130bcd is a nice option if you decided to move it to a dif bike , etc.
    derailleur? I hardly know her
    http://a2bikegeek.wordpress.com/

  14. #14
    Senior Member ZiP0082's Avatar
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    Quote Originally Posted by bryyando View Post
    would these work with 3 bolt cranks? i know i should replace them but its not my decision
    No, I doubt it. I think this will only work properly with a 5-bolt crank (either 130bcd or 110bcd). For a new 3-bolt chainring, you'll have to ask people who have converted bikes in the past for their spare ones, or could try the ebay route.

  15. #15
    Senior Member mihlbach's Avatar
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    Quote Originally Posted by ksyrius View Post
    I may be wrong but in my experience 3/32 chainring with a 1/8th chain is a bad idea. I was doing this for awhile and it totally destroyed my chainring. Not to mention that you get horrible power transfer due to the fact that the chain has so much side to side play on it.

    Also that side to side play overtime can make your chainring weaker, and on larger size chainrings it can make them fold. Happened to my friend.

    if your set on a 3/32 chainring just get a 3/32 chain and 3/32 cog.

    but @ 25 dollars those rockets seem alright.
    Eh...if you have a decent chainring and a good chainline, it doesn't matter. The chainring will last, and the power transfer is the same. Been there done that. Your friends problem was probably that he had a bad chainline and/or crappy chainring. The fact that the chainring folded is certainly more the fault of the chainring than the chain.
    Last edited by mihlbach; 08-20-08 at 05:50 PM.

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