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Ibis HD5 Mullet

Mullet Ibis HD5 Build

Ibis HD5 Mullet

Well, like any great mystery there’s only one image of this one, but at least it’s not blurry… This Ibis HD5 Mullet was wrapped up late but we had to shoot it before it went to it’s new home.

This bike features a slightly under-traveled fork to keep the mullet’s 29″ front end at a similar total height of the 27.5″ option. This gives the bike a more “as designed” headtube angle and therefor trail measurement.

Building a Mullet with the same amount of fork travel would notably slacken the bike out. When you go too slack with a bike it doesn’t want to change direction due to increase in the wheel flop as well as the modified contact points.

Working to keep the axle to crown measurement closer to the 27.5″ design allows BikeCo’s mullet builds to maintain a personality closer to the stock design. The advantages of the bigger wheel include increased angle of attack from the larger diameter, slightly mellower handling from the larger wheel / mass as well as notably improved braking.

Highlights of this Mullet HD5

Built for a long-time BikeCo client this is a special bike and it was great to see it leave the shop with a stoked rider.

BikeCo Pro Tune suspension front and rear help personalize the performance window and setup.

Industry Nine stem and Chris King inset headset in orange give the bike some added pop. One-Up carbon bar, seatpost and chain guide. SRAM X01 AXS drivetrain with a 52t copper cassette and a Wolf Tooth Oval chainring drive the bike. Magura MT7 with HC3 levers and Hope 2 piece orange rotors stop it.

And once again this build is highlighted with custom Chris King wheels. The matte mango King hubs are laced to WTB aluminum KOM Tough rims with DT Swiss spokes.

Chris King hubs, serviced approximately yearly, have a near infinite service life. King products are made in Portland Oregon giving your bike some Made in the USA credibility. Wolf Tooth as well as some Industry Nine products are as well.

In the market? Email, call or chat in to go through your riding requirements with our team today.


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Mullet Ibis HD5

Mullet Ibis HD5 Build

Mullet Ibis HD5

Enjoy a couple photos of this Mullet Ibis HD5 before it heads to it’s new home.

Mullet setups consist of a 29″ front fork and wheel with a 27.5″ rear wheel. Generally mullet bikes are based around 27.5″ frames to keep the bottom bracket from dropping as it would on a 29″ bike.

The larger front wheel offers some interesting advantages that mullet riders take advantage of. Notably are the improved roll over or angle of attack from the larger diameter, the slightly mellowed steering input from the larger wheel as well as improved braking performance.

When we first started testing Mullet HD5 setups we gained a lot of insight from BikeCo Pro Rider Brian Lopes. Brian pointed out how much harder he could confidently get on the brakes before and even into a corner on the larger front wheel.

With a smaller rear tire riders are also able to stay lower on the bike in the steeps or the air. The 27.5″ rear tends to be faster and more agile around tight corners in steep terrain as well. This is one of the reasons you see so many Mullet’s on the EWS circuit – although you may have to look closely as not every brand acknowledges the larger wheel option!

Ibis HD5 Mullet Build

Building a Mullet

We’ve been testing a variety of mullet setups over the past couple seasons. What we’ve found is running a slightly under-traveled fork helps maintain the bike’s personality and performance.

Since the last few mm’s of your bike’s suspension really aren’t where you’re living through the stroke few riders notice that compromise. Compare this to adding a bunch of trail and headtube angle (and with those adding wheel flop) which riders will notice quickly when trying to change directions. Almost every rider leans towards having better handling!

The larger front wheel also creates some “false travel” to make up for some of the change to accommodate the axle to crown measurement.

Questions? No problem. Our team has the answers to help you spec the right bike or upgrades. Call, email or chat today.

Build Details

This HD5 build is highlighted with some of the best bits available in MTB.

FOX Factory Suspension front and rear is Pro Tuned for a personalized setup specific to rider weight, aggression, ground speeds and terrain. With Pro Tune suspension we narrow FOX’s performance range for an individual client. This means every click is a more minute adjustment providing riders even more performance from their FOX forks and shocks.

SRAM X01 AXS shift pod and rear derailleur control a 52t copper cassette and 12sp copper chain pulled by RaceFace Next-R carbon cranks and a Wolf Tooth chainring. The X01 AXS derailleur is slightly more robust than the XX1 counterpart – great for aggressive riding in burly terrain.

Red highlights across the bike include an Industry Nine stem as well as Chris King headset.

Red Chris King hubs are laced to WTB rims built in-house. A variety of DT Swiss spokes are available depending on performance and weight goals.

Keeping this Mullet HD5 under control in the steeps are Magura HC rotors with Magura MT5 brakes with HC levers.


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More MTB Mullets – Comparing Travel, Headtube, Trail & Flop

Measure Your Mullet

More MTB Mullets – Comparing Travel, Headtube, Trail & Flop

An interesting question come across my email wondering about MTB Mullet setup. In particular headtube angles and performance. How did the headtube angle compare between the Yeti SB165 in a 27.5″ stock setup with a 180mm fork compared to the Mullet 29″ 170mm concept?

What started as a quick email reply of concept turned into a more thorough review and I thought with more questions on MTB mullets these days we could put it up on a post for everyone.

So, the disclaimers. I couldn’t find Yeti’s published SB165 Mullet geo so I build a model to review. These models aren’t gospel truth on geo, but having been in this game for a lot of years some of the geo’s you’ve seen published I wouldn’t take for gospel either. Point is, these numbers will give you an idea of the concept I wouldn’t bet the farm on precision four points behind the decimal…

Next disclaimer. It could be a thesis trying to explain how these changes directly modify performance so we’re not going there today. We’ll have some basic concept and comparison of how one change directly modifies a whole bunch of the handling.

OK here we go. Continue reading More MTB Mullets – Comparing Travel, Headtube, Trail & Flop

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SB130 Mullet Geometry

SB130 Mullet Geometry

Lot of questions on the new Mullet concept. Yeti has come out with the geometry for the SB140 as well as SB165 mullet conversions (check out our interactive geo comparison here) but I got a lot of inquires on the SB130 concept. So let’s look at the SB130 Mullet Geometry.

My first instinct, having owned and SB130 since the launch, is that the BB dimension would be too low for most riding conditions. But I’m all for a quick look to see how right I am. OK, or, well, kinda right.

I built out a model of the Medium SB130. When you “mullet” a bike the geo changes are more distinct on the smaller bikes due to the proportion of height change in wheel to total wheelbase. So a large would actually have slightly less dimensional shift than this example but you get the idea. Continue reading SB130 Mullet Geometry

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Alchemy Nine7Five First Thoughts

Alchemy Nine7Five Ride Review

Alchemy Nine7Five First Thoughts

BikeCo.com owner Joe Binatena is rocking a mullet. We went for a pedal to go through his Alchemy Nine7Five First thoughts.

“Mullet” bikes are 29″ front and 27.5″ rear setups. If you’ve looked closely on this year’s EWS photos you’ve seen them under a wide range of riders.

Let’s take a quick look at the concept. Continue reading Alchemy Nine7Five First Thoughts