Rigid fork

[Stravakiddo]

There are lots of brands outta here. Can anyone recommend a good one for xc/trail? (29)

[jonathanf2]

I think most the AliEx MTB carbon forks are some variation of the Toseek forks. I would just pick the one with the best price on AliExpress. This guy on Youtube tested an AliEx 29er carbon fork on a flight of stairs, plua did a few small bunny hops and it actually survived the test. I think you'll be fine as long as you don't do any massive jumps on your bike.

https://youtu.be/5BmqBC8IFq4?t=227

[Tijoe]

You need to look at your frame geometry and determine what travel suspension fork it is designed for.  Older XC frames had 80 to 100mm travel.  The latest generation XC/Trail frame have 100mm travel to 130mm.  (I believe that 120mm has become the most common for modern rigid hardtails.)

With the above being written,  the most common 29er rigid fork I have run across fit 100mm wide hubs, have a 45mm offset, and come in 470 to 490mm blade lengths.  These generation forks can be purchased for around $100.

Then there are the new generation 110 boost forks with 45mm offset that most often have 480mm fork lengths and these days cost $200+ each.

(I found that for 120mm travel frames, carbon forks with 480mm blades match the frame geometry best.)

There are so many forks listed on Aliexpress, I recommend searching under carbon mtb forks and start studying each forks geometry.

[Stravakiddo]

You need to look at your frame geometry and determine what travel suspension fork it is designed for.  Older XC frames had 80 to 100mm travel.  The latest generation XC/Trail frame have 100mm travel to 130mm.  (I believe that 120mm has become the most common for modern rigid hardtails.)

With the above being written,  the most common 29er rigid fork I have run across fit 100mm wide hubs, have a 45mm offset, and come in 470 to 490mm blade lengths.  These generation forks can be purchased for around $100.

Then there are the new generation 110 boost forks with 45mm offset that most often have 480mm fork lengths and these days cost $200+ each.

(I found that for 120mm travel frames, carbon forks with 480mm blades match the frame geometry best.)

There are so many forks listed on Aliexpress, I recommend searching under carbon mtb forks and start studying each forks geometry.

I have a cannondale trail with 120mm fork but from factory it had a 100mm. no boost

[Tijoe]

I have a cannondale trail with 120mm fork but from factory it had a 100mm. no boost

Look up your frame size and model year here.    We can use this as a baseline to see what fork length you will need that best matches your geometry and handling of your bike.

https://bikeinsights.com/

[Stravakiddo]

Look up your frame size and model year here.    We can use this as a baseline to see what fork length you will need that best matches your geometry and handling of your bike.

https://bikeinsights.com/

https://www.cannondale.com/-/media/images/my21/bikes/mountain/trail-bikes/trail/pdp/trail/trail_5_8_geo_table.ashx?h=5610&iar=0&w=3750&hash=53C75AE51F101B13C88B771C5244462F

[Tijoe]

https://www.cannondale.com/-/media/images/my21/bikes/mountain/trail-bikes/trail/pdp/trail/trail_5_8_geo_table.ashx?h=5610&iar=0&w=3750&hash=53C75AE51F101B13C88B771C5244462F

Sorry I didn't ask in my last post. What size is your frame?   I want to compare your geo to a couple of my hardtail frames where I often run a rigid fork.

[Stravakiddo]

Sorry I didn't ask in my last post. What size is your frame?   I want to compare your geo to a couple of my hardtail frames where I often run a rigid fork.

Size M
I don't know if I already told in some of my previously messages. Basically the frame was made for 100mm fork, but since I had to use a taper adapter now it is like I have 110 or 120mm since the height of the frontal area has been increased

[Tijoe]

comparing your frame to my Spcycle frame, the geometries in a medium size are almost exactly the same.

Below are 2 forks I have that I have purchased and have used on this frame when I am not using a suspension fork.   Note:  The forks have different offsets, but I really haven't noticed a difference in handling.  I have used both of them when this bike is configured for bikepacking. 
- These are both 485mm 29er forks.

-Boost fork

https://www.aliexpress.us/item/3256805358410671.html

100mm hub fork. 

https://www.aliexpress.us/item/3256805523934471.html