Weird Reversed Stem Geo / Chat

Its one of the best reasons for Dual Crown on an enduro style ebike. There's a lot of flex with single crown forks in comparison. Now the Podium is only aroung 60g lighter than the Fox 40, and the amount of ebikes that come with the Podium, its so much better IMO to go dual crown instead. I dont even care for the 200mm travel of a dual crown, but the directness and precise steering, and lack of torsional and directional flex are unrivalled.
The only thing I don’t like about my 40 is the turning radius with a fat head tube, like I have on my Voima. It’s only a problem on super tight switchbacks, but I have a lot on my local trails. I’m hoping my new Crestline head tube will be narrower so I’ll have a better turning radius, as I’m intending on getting the 200mm rear linkage for a 200/200 beast! 🤘🏻😎
 
⚡ EMTB Pro Go Pro — exclusive discounts & ad-free Peaty's 25% off & more · Ad-free browsing · Pro badge See the deals →
New member. Joined on account of this thread. I've ridden the RR stem loved it and have been running a similar setup for the last 3+ years.

I think the best way to discuss bike fit in this context is with RAAD and RAD. We are really trying to determine where your hands are relative to your feet and scaling that across rider sizes. More info on RAAD and RAD + a calculator here: Mad Scientist RAD calculator options - MAD SCIENTIST MTB

My bike is an XL gen Privateer 161 with Surly Sunrise bars and a 31mm renthal apex stem. I'm 181cm tall (6'0").
- RAAD ~60°
- RAD 899mm
- Reach 443mm (from grip to bb)
- Stack 783mm (from grip to bb)

161 + Surly 2.webp


161  + Surly.webp
 
That is such a franken bike.
Is it 500 reach and you are 70 behind that giving you 430 reach?
310 reach to grips
I am mire like 50..55mm behind center og steerer tube to grips.
Combination of -50stem and 70rise is equal to -15 stem and 0 rise 🥳
 
They both have two wheels... and saddles that are angled in odd, but opposite, directions? :)
I set my seat angle to be comfortable when climbing which is why the seat points down on flat land.
 
I set my seat angle to be comfortable when climbing which is why the seat points down on flat land.
Have you considered a switchgrade, might be ideal for you and @irie

 
Have you considered a switchgrade, might be ideal for you and @irie

I have but can't justify the price when I'm very comfortable with my seat's current position. I live in southern California and the riding is sustained climbing and long descents. I'm not often riding flat land.
 
I've just ordered one of these:


Should be arriving this week.

Not cheap (or obscenely expensive considering its origins) so I hope I get on with it!

I'll feedback here. Thinking of adding a Reach increaser headset too as I have a ZS56 headtube, or rotate the stem like plf013 above, but the Intend stem is +25 length, maybe too long to spin around!

I run PNW Range handlebars with 25mm or 38mm rise, I can't remember, so it'll be interesting to see if they fit the stem with it's 20mm rise limit and clamp design... 🤔
 
I've just ordered one of these:


Should be arriving this week.

Not cheap (or obscenely expensive considering its origins) so I hope I get on with it!

I'll feedback here. Thinking of adding a Reach increaser headset too as I have a ZS56 headtube, or rotate the stem like plf013 above, but the Intend stem is +25 length, maybe too long to spin around!

I run PNW Range handlebars with 25mm or 38mm rise, I can't remember, so it'll be interesting to see if they fit the stem with it's 20mm rise limit and clamp design... 🤔
Why is there a max rise?
 
Why is there a max rise?
I would guess that because of the 2 bolt clamp design. Trying to fit high rise bars through the clamp will prove challenging because you can't open up the clamp wide enough.

With most stems the 4 bolt clamp face completely comes away allowing any rise bar to be fitted.
 
Why not fitting higher rise bar and lower the stem? that would look much more Sexy to me.
I just wanted to give it a try. No return if you cut your steer tube too short.
The bar is already 38 mm high. Very hard top find a bar witha higher rise, good shape (up and backsweep) in 31.8 mm.

I know This fitting is uggly af, and very flimsy.

Only one ride with it for now. I will dig into it a little bit more now to find the good balance. I ll add one more token in the fork and réduce the pressure. Lot more to come
 
Where did you buy it? I can't find it in the UK. Also, I've seen other people comment that they couldn't get it to grip tightly enough on the steerer as there isn't a large clamping surface - does it feel secure to you?
Aerozine Website. It took only 4 days to.come: XNC 10 STEM Bundle (31.8 mm clamp diameter) - AEROZINE

Only one ride and no issue with the only 20mm high clamp. Berms, jumps, rough stuffs it stays strait
 
Aerozine Website. It took only 4 days to.come: XNC 10 STEM Bundle (31.8 mm clamp diameter) - AEROZINE

Only one ride and no issue with the only 20mm high clamp. Berms, jumps, rough stuffs it stays strait
OK thanks. Not that cheap with shipping but still less than BMB etc. I'm just wary of cutting my steerer down in case I want to go back to regular stems. Maybe I'll try it on an old set of forks first.
1774350561923.webp
 
Somebody needs to design an asthetically pleasing set up. It just looks horrendous.
It’s the bars that make it look ridiculous too! Ideally I’d have the raised reverse stem, which is a lot taller than my hacked job, and then bars with lower rise.
 
Here's some of my parts.. still waiting on bars.
Fifty Fifty Stem 30mm offset and 28mm rise/ 31.8mm
Spacer / Reach adjust 12mm
Screenshot 2026-03-24 at 1.55.48 PM.webp
Screenshot 2026-03-24 at 1.56.00 PM.webp


Will shoot a complete setup once I get my bars.
Current mounting solution give a 40mm rise and -8mm offset (DM mounting pattern has 10 mm offset, so reversing the stem will natually reduce it by -10)
Bars will be 35mm rise with 5 backsweep @ 780mm. There's a 50mm version available.

I think for people looking into the whole 31.8 bars, moto parts for surron might come in handy.

total cost shipped to Canada: $216 CAD.
Stem spacer / offset - $98
DM Stem - $61
Bar - $57
 
Last edited:
Have you ridden that particular bike in non-goofy format on that route ?
Good point. I’d definitely rode the black Crestline I had with Avinox M1 motor there. Perhaps not exactly the same route.

What I notice with this funky setup is the amount of front end grip on flatter corners. Can really turn the bike hard due to the extra leverage on the bars.

And as soon as it gets steep it’s ridiculously easier than conventional setup.
 
Keep reading
    Browse all

    Similar Threads

    Community Stats

    Since 2018
    668K
    Messages
    40,771
    Members
    Join 30,000+ Riders, it's free!
    Back
    Top