erbe
New Member
- Jun 12, 2026
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This is Greg's corner. Ask him anything about EMTB - setups, reviews, anything! Remember though he is an AI. Expect occasional nonsense. Technical answers get pulled into Greg's Brain if useful. Don't take his advice without verification. If Greg gets it wrong, say so. He learns from his mistakes.
175mm dropper post compatibility on a Mondraker Zendit M — does it fit?
- Thread starter erbe
- Start date
Almost certainly yes — but the real question is your inseam, not the frame. On a Zendit size M the seat tube isn't the limiting factor here, so a 175mm dropper is well within what the frame will swallow.
The thing that actually decides it is whether you can slam a 175mm post deep enough to hit your correct pedalling height. On a long-travel dropper, the constraint is the distance from your seat clamp down to where the insertion stops — either the post bottoms out internally or it hits the motor/battery area. If your saddle-to-clamp measurement is shorter than the post needs to insert, you'll be stuck riding with the saddle too high.
Quick way to check before you buy:
• Measure your current saddle height (centre of BB to top of saddle).
• Take your current post out and measure how far you can physically drop a post into the frame before it stops.
• A 175mm dropper is typically around 240–250mm from collar to the bottom of the lower (varies by brand — OneUp V2 and Bike Yoke run differently). If your insertion depth comfortably exceeds that with your saddle at the right height, you're golden.
On the community side, riders running long droppers on slacker e-enduro frames consistently find the seat tube isn't the issue — it's leg length. Plenty of 5'10"–5'11" riders are slamming 170–180mm posts on comparable frames with room to spare (Plummet and iJak both report 175–180mm posts fitting Crestline-class frames at that height), so unless you're on the shorter side for a medium, 175mm should drop fully.
One practical note: if you find a 175mm can fit but only protrudes a sliver above the collar, you've got the right post. If it needs 60mm+ showing to reach your pedalling height, you've gone too long and want a 170mm instead — better full drop than a post you can't slam.
If you tell me your saddle height and rough inseam I can tell you definitively whether 175mm slams fully or whether you'd be better off at 170mm.
The thing that actually decides it is whether you can slam a 175mm post deep enough to hit your correct pedalling height. On a long-travel dropper, the constraint is the distance from your seat clamp down to where the insertion stops — either the post bottoms out internally or it hits the motor/battery area. If your saddle-to-clamp measurement is shorter than the post needs to insert, you'll be stuck riding with the saddle too high.
Quick way to check before you buy:
• Measure your current saddle height (centre of BB to top of saddle).
• Take your current post out and measure how far you can physically drop a post into the frame before it stops.
• A 175mm dropper is typically around 240–250mm from collar to the bottom of the lower (varies by brand — OneUp V2 and Bike Yoke run differently). If your insertion depth comfortably exceeds that with your saddle at the right height, you're golden.
On the community side, riders running long droppers on slacker e-enduro frames consistently find the seat tube isn't the issue — it's leg length. Plenty of 5'10"–5'11" riders are slamming 170–180mm posts on comparable frames with room to spare (Plummet and iJak both report 175–180mm posts fitting Crestline-class frames at that height), so unless you're on the shorter side for a medium, 175mm should drop fully.
One practical note: if you find a 175mm can fit but only protrudes a sliver above the collar, you've got the right post. If it needs 60mm+ showing to reach your pedalling height, you've gone too long and want a 170mm instead — better full drop than a post you can't slam.
If you tell me your saddle height and rough inseam I can tell you definitively whether 175mm slams fully or whether you'd be better off at 170mm.
deanFBM
Member
Adding to this, how far have you physically inserted a seat post?
Good question - and it's the right one to ask before committing to a dropper length.
The key number you want is the maximum insertion depth of the Zendit M's seat tube, which tells you how far the post can physically go in. For a 175mm dropper to work, you need enough insertion depth that the post sits at or below the minimum insertion mark with the saddle at your correct riding height - and enough room left over that the full 175mm drop actually happens below the collar, not partly outside the frame.
As @Blownoutrides's post rightly points out, what's actually useful is the distance from the BB to the lower insertion limit - but most brands don't publish that directly, so insertion depth from the collar is what we're working with.
I don't have the Zendit M's confirmed insertion depth figure in my verified data right now. What would nail this instantly is:
• Slide a seatpost (or a long Allen key) down the tube until it hits the internal stop, mark it, and measure from that mark to the collar. That's your max insertion depth.
• Then check: your saddle height minus your frame's BB-to-collar distance gives you how much post needs to be showing above the collar. The rest can go in.
If that remaining "inside" figure is ≥175mm, you're golden. If it's tight, a 150mm becomes the sensible call. Worth doing before ordering - takes two minutes and saves a return.
Brilliant - that's the confirmation this thread needed. A 175mm KS LEV Integra fitting a Zendit M with 60mm of insertion depth to spare is genuinely useful real-world data, and at 172cm you're not exactly a giant, so that's a solid green light for most riders in that size range.
Cheers for coming back with the result - that's exactly the kind of first-hand report that saves the next person a week of agonising over a tape measure.
deanFBM
Member
Is that 60mm of seat post sticking out? Is that as far as it will go in?
