






🚵♂️ Elevate your ride, drop the limits.
The EXA Form 900i dropper post is a high-performance, internally routed bike seatpost available in 30.9mm and 31.6mm diameters. Made from durable 7075 aluminum alloy, it offers multiple length (345mm, 395mm, 445mm) and travel (100mm, 120mm, 150mm) options. Featuring a smooth remote lever for quick seat height adjustments, it’s engineered for riders seeking seamless control and a clean, integrated look on MTB and e-bikes.

















| ASIN | B09YH2PD3K |
| Best Sellers Rank | #57,787 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #16 in Bike Seat Posts |
| Brand | JFOYH |
| Brand Name | JFOYH |
| Color | Black |
| Customer Reviews | 4.2 out of 5 stars 221 Reviews |
| Included Components | Dropper Post Body, Lever Kit |
| Item Dimensions W x H | 1.2"W x 17.5"H |
| Item Weight | 0.73 Kilograms |
| Manufacturer | JFOYH BIKE |
| Material | Aluminum |
| Material Type | Aluminum |
| Product Dimensions | 1.2"W x 17.5"H |
| UPC | 774144172076 |
| Warranty Description | 12-month Limited Wrranty |
M**T
Works for 26" bike for pre-teen, first use of day a bit tight
I have a kid that's getting into Mountain Biking, and put it on a 26" XXS Specialized RockHopper. Installation went as well as could be expected. Two main issues: - On the XXS RockHopper, it has a front derailleur, so finding a good spot for the lever took a bit of trial - The seat hydraulics get stuck the first time of the day, so getting it to extend the first time took some trial. Basically, I put a skinny screwdriver through the lever so I could pull it with my right hand, held the shaft with left hand, and held the other end between my feet and tried pushing/pulling until it unlocked. The provided cable was plenty big enough (I cut off over a foot). The lever hardware seems pretty great, and I didn't feel like I was going to strip any screws or break anything. Adjusting the tightness of the cable went really well due to the two adjustment screws (plenty of tightening room). The kid isn't very strong in the thumbs yet, so the first ride of the day he has to use two hands to "unlock" the stuck piston. After that it is incredibly smooth going up and down, and his left thumb is able to push it in okay enough (it's still tough, but it'll get easier as muscles grow). Again, the seat post does seem to get 'stuck' after sitting there for a day, but then goes super smooth the rest of the day. I'm happy with the post and the installation. It seems like good quality for the price I paid. It definitely isn't as good as the one on my own bike (mine has no 'stuck' issue after prolonged periods of inactivity), but good enough for this starter bike or anyone on a budget that wants a post that will last. I'll update this if I ever hit issues.
L**.
👍🏽works great so far.
I just finished installation and test ride and am very pleased with this dropper post. It came with all the bits needed to suit my bike. It releases easily, pops up strong and slides down smoothly. Much better than the Fezzari OEM one. No instructions were included but installation was easy after working through removal of the old post, cable and lever.
T**M
Good product
Works great but a lot of trouble instaling
J**L
Great value
Great value for the money and easy to install. Lots of reviews state that it sticks on first use after sitting for a while. I found this to be true but easily solved it by dropping the post before I hang the bike up. First use then is raising it instead of dropping it and I've had no issues since.
A**T
Very disappointed from the get go...
Purchased this item back in July for the Ozark Trail Ridge Pro Max build from Berm Peak on youtube. Was hoping it would be a quality product and even looked past a few things but after today I can no longer be optimistic. First day installing on the bike the actuator lever system was not hold a firm clamp of the dropper cable and after a few attempts to correct the issue the threads stripped out. Luckily I was working on this bike with a buddy who runs bike shop and was able to pick up a Wolf Tooth lever system. ($60). Once new lever system was installed dropper post worked pretty decent other then being fairly stiff. I noticed a few weeks after installation the post would stick in the lowered position. This bike is a spare I built for fun so it has VERY LITTLE USE. Well today Oct. 20th 2024 I decided not to ride my Norco and take the old Ozark for a roll through the neighborhood and BAM seat dropper stuck in lower position and once it popped up the seat wont lock in any lowered position now. So it moves up and down with you as you move on the bike, if you sit it smashed how into the lowered position... If you try and dismount you can't keep the seat lowered for a safe dismount, this can be very dangerous if I don't replace or fix this system. Its a shame with the $60-$70 I had to spend on the Wolf Tooth actuator lever and perch - add that to the original cost of this seat dropper I could have purchased an E-Thirteen or a RaceFace... Not a happy camper. If someone knows how to contact this seller please let me know. Thank you
M**N
Good
Fast and easy
A**Z
Works Flawlessly!
Just got one and it was missing parts. I reached out ant they are taking care of it. Customer support is on point! I have bought 3 of them for 3 different mtb and they work flawless. I do recommend this product.
B**.
Buy extra housing!
I can’t speak for the amount of time it will survive but it installed pretty easy if you have a basic know how of MTB cable installs. The cable was long enough but the housing was too short for my Large Giant Stace E+2. Goes up and down quick. Lever seems decent and it does what I need for the price I want. Can’t imagine spending $200-$300 on a dropper post would make it much better.
Trustpilot
1 month ago
3 weeks ago