SB165 Mullet

PB Forum :: Yeti
SB165 Mullet
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Posted: Jun 18, 2021 at 6:05 Quote
Danzzz88 wrote:
Thinking of getting some 29 lower legs and a 29 rim and relacing my wheel to give this a go but is it worth the sacrifice of losing 20mm travel? Doesn't a 180mm fork ran slightly softer with more sag and 27.5 feel just as plush as a 29 160mm that needs to be run with less sag?

I got one coming tomorrow to replace my 2020 Capra Pro Race and I plan on slapping a 2021 Fox 38 Factory set at 170 converted to 170mm. I think the plushness will be there with the stock 27.5 fork and 180 travel set softer as you referenced above, but the wheel size matters to me more in terms of dealing with obstacles and holes.

If I like the travel,I will convert to coil via Smashpot with a softer spring rate before considering bumping it down to 160.

Posted: Jul 17, 2021 at 6:14 Quote
Been loving my SB165 Mullet in XL. 193cm and 108kg with 550lbs spring feels pretty perfect, running 170mm 38's. Also came off a forbidden Druid that I had for about a year and before that an Intense Carbine, also been riding the GT Fury 29 DH bike. The Yeti feels way more DH bike than any other enduro/trail bike I've had, so much so I'm planning on racing it for the DH and Enduro season this year. Despite this I've also been doing PR's on the climbs so it's a massive win all around in my books.

Most recent ride was really wet on more trail bike trails and this was the first time I really noticed the front wheel wandering a bit, probably because I was in a more cautious/less attack body position due to the conditions, had 20mm spacers under the stem so I'm dropping down 10mm to see how that feels.


Posted: Jul 17, 2021 at 8:12 Quote
nice bike! I'm running a 170mm 38 29er up front with 10mm of spacers below the stem. with 30mm rise bars. so far it's been doing well.

Posted: Jul 18, 2021 at 14:31 Quote
AMBURGERS wrote:
Been loving my SB165 Mullet in XL. 193cm and 108kg with 550lbs spring feels pretty perfect, running 170mm 38's. Also came off a forbidden Druid that I had for about a year and before that an Intense Carbine, also been riding the GT Fury 29 DH bike. The Yeti feels way more DH bike than any other enduro/trail bike I've had, so much so I'm planning on racing it for the DH and Enduro season this year. Despite this I've also been doing PR's on the climbs so it's a massive win all around in my books.

Most recent ride was really wet on more trail bike trails and this was the first time I really noticed the front wheel wandering a bit, probably because I was in a more cautious/less attack body position due to the conditions, had 20mm spacers under the stem so I'm dropping down 10mm to see how that feels.


I used to think my sb165 was super plush until I tried a cheap e bike, it was only a basic alloy one with Rockshox Recon fork and basic Rockshox air shock...it did have 2.8 plus tyres though at around 12 psi and the bike weighed 23kg but still I was shocked to find what was effectively a walmart brand e bike felt more cushy than my £10'000 Elevensix shocked superbike...the geometry was wack though. But what that all put into perspective was just how important setup, tyre pressure, geometry and sprung mass is. Spending loads of money alone doesn't always give you a better ride.

I noticed you are running a 550lb spring, does it feel on the soft side? Push wanted to put me on a 450lb and I requested a 425lb at 72kg bodyweight, but a quick ratio calculation dividing spring rate by rider weight shows I'm still at a ratio of 5.9 with the 25lb lighter spring, whereas you are running a ratio of 5.09. Be interesting to see what other coil weights people are running for their bodyweight because even tgough my bike is pretty plush especially at speed when you hit the right frequency of bumps, I still don't think it feels downhill bike plush or even as plush as that cheap e bike...I know a lot of reviews say the Specialized Enduro is much plusher than the SB150 and given the smaller wheels of the SB165 I feel that maybe it's quite a bit behind the current new crop of 29" downhill monsters. Just wondering if the time is right to sell it before they release a new model, but tbh I've not tried any of the other new super enduro bikes so can only go off reviews and peoples opinions.

Posted: Jul 19, 2021 at 1:32 Quote
Danzzz88 wrote:

I used to think my sb165 was super plush until I tried a cheap e bike, it was only a basic alloy one with Rockshox Recon fork and basic Rockshox air shock...it did have 2.8 plus tyres though at around 12 psi and the bike weighed 23kg but still I was shocked to find what was effectively a walmart brand e bike felt more cushy than my £10'000 Elevensix shocked superbike...the geometry was wack though. But what that all put into perspective was just how important setup, tyre pressure, geometry and sprung mass is. Spending loads of money alone doesn't always give you a better ride.

I noticed you are running a 550lb spring, does it feel on the soft side? Push wanted to put me on a 450lb and I requested a 425lb at 72kg bodyweight, but a quick ratio calculation dividing spring rate by rider weight shows I'm still at a ratio of 5.9 with the 25lb lighter spring, whereas you are running a ratio of 5.09. Be interesting to see what other coil weights people are running for their bodyweight because even tgough my bike is pretty plush especially at speed when you hit the right frequency of bumps, I still don't think it feels downhill bike plush or even as plush as that cheap e bike...I know a lot of reviews say the Specialized Enduro is much plusher than the SB150 and given the smaller wheels of the SB165 I feel that maybe it's quite a bit behind the current new crop of 29" downhill monsters. Just wondering if the time is right to sell it before they release a new model, but tbh I've not tried any of the other new super enduro bikes so can only go off reviews and peoples opinions.

Hey Danz, To me the rear end feels pretty perfect for DH and absorbing rough trails, being my first mullet bike I don't feel any limit to the 27.5 rear and I haven't ridden a 27.5 bike otherwise for around 4 years.

Regarding the spring rate, it feels plush off the top but with plenty of support at sag (due to the suspension design I assume) it also never bottoms out harshly as the 165 is quite progressive. So it's definitely a bike that I would tend to under-spring than over-spring which seems like you might be doing? I also used the Yeti Set-up guide to help with spring rate, it said a 575 but as fox don't make it in this size (or any size?) I just went with a 550lbs. I put your 72kg into the Yeti shock setup guide and it gives you 400lbs, I would definitely recommend you give that a try as this Yeti is for sure the best trail/enduro bike I've had. I've also demo'd a Specialised enduro which in comparison felt more dead and sluggish and not necessarily any better at absorbing hits than the SB165 in my experience, that could have a lot to do with air shock (enduro) vs the Coil Shock on the SB165. One of the main benefits for me with the SB165 is its progressiveness that works so well with coil shocks. Hope this convinces you to stick with the Yeti and make some set-up changes Smile It's worth it!

Posted: Jul 19, 2021 at 2:19 Quote
So another quick look at the Yeti calculator, it advises me at 72kg a 425lb spring rate, and at your weight of 108kg a 625lb spring rate..it will show 25lb less than that if you select T1 instead of T3 etc as the cheaper FOX VAN coil shocked model only comes in 50lb increments.. but as I say if you select T3 with the DHX2 it puts me on 425lb and you on 625lb, so I'm thinking you are getting a fair bit softer experience than most by being 75lb undersprung. But if it works it works and you obviously seem very happy with it. I might try a lighter spring to see how it goes, trouble is I read if you go too soft on the spring you can sometimes end up with a harsher ride as the bike ends up in the harsher, lower leverage rate portion of the stroke...but given the sb165 seems fairly linear but progressive this shouldn't be too much problem, the only thing with Yeti is the sag point is quite important, as that is where the Switch Infinity is at top dead centre and in the optimal position for pedalling antisquat at sag, if I go too soft I will be out of the range of this sag point losing some of the pedalling benefits of the Switch.

Posted: Jul 19, 2021 at 7:55 Quote
Danzzz88 wrote:
So another quick look at the Yeti calculator, it advises me at 72kg a 425lb spring rate, and at your weight of 108kg a 625lb spring rate..it will show 25lb less than that if you select T1 instead of T3 etc as the cheaper FOX VAN coil shocked model only comes in 50lb increments.. but as I say if you select T3 with the DHX2 it puts me on 425lb and you on 625lb, so I'm thinking you are getting a fair bit softer experience than most by being 75lb undersprung. But if it works it works and you obviously seem very happy with it. I might try a lighter spring to see how it goes, trouble is I read if you go too soft on the spring you can sometimes end up with a harsher ride as the bike ends up in the harsher, lower leverage rate portion of the stroke...but given the sb165 seems fairly linear but progressive this shouldn't be too much problem, the only thing with Yeti is the sag point is quite important, as that is where the Switch Infinity is at top dead centre and in the optimal position for pedalling antisquat at sag, if I go too soft I will be out of the range of this sag point losing some of the pedalling benefits of the Switch.

If you do the 2020 model it gives me lower spring rates, as per the ones I mentioned so it seems the 2020 shock (which is what I have) has a heavier damping tune? Either way, when I measure sag I’m at around 27% so it seems pretty good to me Smile

Posted: Jul 19, 2021 at 9:44 Quote
I notoced if I select 2020 c1 which ia the FOX Van it puts me on 350lb but I think thia is due to the 50lb increments on the lower end shock, 2020 dhx2 puts me 25lbs less than 2021 at 400lbs.

Posted: 1 days ago Quote
im at 190# riding weight and running a 500# fox sls spring, which fox and yeti both recommend. currently running my 2021 dhx2 with 3-4 clicks of hsc, and the rear tire still buzzes the saddle during full compression. anyone else have the same issue? even on small 2-4 foot drops with transitions im hearing the tire and saddle buzz.

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