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  1. #1
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    Fat bike conversion to 29+ fork options

    Trying to flip my Trek Farley to 29+ .I've found the rims and hubs I want however fork options are more problematic. Preferably I want a rigid carbon fork but seems Trek have discontinued the Haru and now they only offer this: https://www.trekbikes.com/ca/en_CA/r...-fork/p/12931/
    Now this is 100mm spacing. Ideally I wanted 150 for Hope Fatsno hubs. There are plenty of suspension fork options for 150mm but not so many for rigid forks. Can anyone suggest anything? Also, I can find plenty of discounted 29+ forks with 110 Boost spacing. Wondering how that would effect the feel of the bike. Current rear hub spacing is 197. Thanks


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  2. #2
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    Are you sure the Haru is out of stock?

    https://www.trekbikes.com/us/en_US/r...-fork/p/13429/
    it's a challenge some of us are ultimately worthy of.

  3. #3
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    There are tons of carbon forks available. Did you check:

    Otso (Lithic)
    Borealis
    Sarma
    Whisky
    Bikes Direct
    E-Bay

    From that list you should be able to find one in your price range.

    My Otso fits 29+ with room to spare. It has an axle to crown of 485mm. I expect a 465 would work too.

    If going 29+, why not go suspension fork to soak up the bumps? I bought a Mastodon Pro STD and it works great with 29+ (no need for the EXT).

  4. #4
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    Quote Originally Posted by tyriverag View Post
    Are you sure the Haru is out of stock?

    https://www.trekbikes.com/us/en_US/r...-fork/p/13429/
    well I contacted Trek USA on chat and they told me the product is now discontinued.


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  5. #5
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    Quote Originally Posted by BlueCheesehead View Post
    There are tons of carbon forks available. Did you check:

    Otso (Lithic)
    Borealis
    Sarma
    Whisky
    Bikes Direct
    E-Bay

    From that list you should be able to find one in your price range.

    My Otso fits 29+ with room to spare. It has an axle to crown of 485mm. I expect a 465 would work too.

    If going 29+, why not go suspension fork to soak up the bumps? I bought a Mastodon Pro STD and it works great with 29+ (no need for the EXT).
    Basically I'm looking for something that fits the look of the bike (Farley 5 in Dnister Black). Lauf Carbonara is a nice match but stupidly expensive. I've heard of a few of those others so will have a look thanks. I was looking into Mastodons but they're still quite expensive. If, for example I got a Manitiou Magnum 29+ with 110 Boost rather than 150mm spacing I'm wondering how it would affect the ride. Is it weird to have 197mm rear and Boost front? I will be getting new wheels so I have some flex in front hub/fork standards.


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  6. #6
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    The front hub spacing has nothing to do with bike function. It may seem strange to run a boost fork with a fat bike rear end but there is nothing inherently wrong with doing so. It's more about making the most of the bike you have. Of course that's what I think because I run a boost Pike 29+ with a 177 rear spec frame. Works great for summer and for winter the rigid fork goes on with the fatty wheelset.

  7. #7
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    Having a set of 110/197 29'r wheels will be very limiting if you ever want to sell. How many would buy that set of wheels? Certainly not as many as would buy a 150/197 set.

    If your 135 fat wheel is TA or convertible to TA you could always use a spacer kit to use it in a 150 TA fork. I did that for a Hadley hub as they do not make a red hub in 150. and it works fine.

  8. #8
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    Carver also has a boost 29+ rigid fork
    "I ride to clear my head, my head is clearer when I'm riding SS. Therefore, I choose to ride SS."~ Fullrange Drew

  9. #9
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    use your stock fork, it clears 29+
    Mike
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    Diamondback Haanjo Trail Carbon
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  10. #10
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    Quote Originally Posted by Swerny View Post
    use your stock fork, it clears 29+
    Sometimes the simplest answers are right in front of you.

  11. #11
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    What fork do you have currently? Are you on Trek's new forkless Farley?
    it's a challenge some of us are ultimately worthy of.

  12. #12
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    thanks for the (amusing!) suggestions. It's a 2016 Farley 5 with the stock aluminium fork. I fancied a lighter carbon fork, making the bike a bit similar to the rigid Stache or lovely Trek 1120. Had pretty much settled on Hope Fatsno hubs and Duroc 50mm rims. The Haru looked like a good replacement but what isn't clear to me is if it would fit 29+ wheelset. My Farley was one of the models that can take a 26", 27.5 or 29+. However the Haru specs list it as only compatible with 26" and 27.5. Also, I take the correct point that I could just stick with the existing fork but at 135mm spacing if I get new wheels built I'll be stuck with another 135/197 wheelset with little re-sale value.


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  13. #13
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    Quote Originally Posted by BlueCheesehead View Post
    Having a set of 110/197 29'r wheels will be very limiting if you ever want to sell. How many would buy that set of wheels? Certainly not as many as would buy a 150/197 set.

    If your 135 fat wheel is TA or convertible to TA you could always use a spacer kit to use it in a 150 TA fork. I did that for a Hadley hub as they do not make a red hub in 150. and it works fine.
    I've heard this before and it would allow me to switch between fat and 29+ wheelsets. How do I know if my front 135 QR is thru axle convertible? I had also thought about spacers but would need to get them custom made.


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  14. #14
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    as i said in the other thread, the Haru (15 x 150) easily takes 29+. This is 29 x 3 Chupacabra on a 40 mm wheel

    Name:  Farley 5.jpeg
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    Mike
    Toronto, Canada
    Giant Trance Advanced 1
    Trek Farley 9.6 + Lauf
    Diamondback Haanjo Trail Carbon
    Scott Solace 10 Disc

  15. #15
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    Iíll sell ya an all black Lythic carbon fork with 150mm front spacing. It fits 29+ no problem and has 9.5Ē of steerer tube. Iím going to swap it out for a fork with rack mounts. PM if youíre interested.

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