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2016 Ibis Tranny 29 Mountain Bike Frame

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Description

2016 Ibis Tranny 29 Mountain Bike Frame

 

The freedom to swap between full cassettes and singlespeed setups is a non-guaranteed XC right that the activists at Ibis Cycles certainly aren’t prepared to let go undefended. If you overlook its questionable naming convention, the Tranny Mountain Bike Frame lets you swap between one cog and many cogs, empowering those who appreciate testing themselves on a singlespeed without sacrificing the option of a full cassette for more grueling terrain.

The Tranny is molded as a carbon fiber monocoque in two separate sections. At the seatstay junction, the wishbone is effectively bolted into a double shear bracket on the back of the seat tube and is shaped to allow a small degree of radial movement. This allows for the chain-tensioning effect of the Slot Machine tensioning unit found just aft of the bottom bracket. As the name implies, there is a slot that allows the clamping hardware in the chainstays to have 15mm of fore and aft movement, and it’s protected by a molded rubber sheath that blocks out dirt, keeping the unit creak-free.

This range of adjustment permits tensioning of the chain when paired with a singlespeed drivetrain, which negates the need for an eccentric bottom bracket. And if you’ve ever pulled your hair out trying to silence a creaky EBB, you’ll appreciate just how much of a benefit that really is. Pull the Slot Machine all the way forward and you can run the Tranny geared with short chainstays for razor-sharp handling in tight trails. But perhaps the Slot Machine’s most unique benefit is that it allows the Tranny frame to be split into two units, making it much more compact when packing for travel.

For all its utility, the Ibis Tranny remains true to its race-proven roots. The low bottom bracket keeps it planted when railing turns, while the short chainstays enhance its responsiveness. With its unified carbon construction, this frame is optimized for stiffness and vibration damping. The front triangle bears some obvious similarities to the Ripley, both in terms of aesthetics and the supremely balanced steering geometry.

The seatstays are noticeably thin, which imparts a comfortable flex into the rear end, while the burly chainstays and oversized pressfit BB92 bottom bracket shell ensure crisp response under power. The internal cable routing is exceptionally well thought-out, and should you run a more stripped-down setup, you can replace the port covers with closed covers to clean up the look. The internal routing is extended to stealth dropper posts as well, which should highlight that the Tranny 29 is a decidedly new-school machine.

The Ibis Tranny Mountain Bike frame is designed for 29-inch wheels only. A size Medium frame weighs approximately 3.08 pounds, without hardware. The frame is available in two colors — Matte Black/blue and Marine Layer — and in four sizes, from Small to X-Large.

XC geometry with 29-inch wheels for pure speed

Monocoque carbon fiber frame for unrivaled weight and stiffness

Allows for single speed conversion with no eccentric bottom bracket

Low bottom bracket for confident stability on corners and terrain

Compliant seatstays absorb trail chatter without compromising efficiency

 

2016 Ibis Tranny 29 Mountain Bike Frame

Frame Material:

carbon fiber

Head Tube Diameter:

1-1/2 to 1-1/8in tapered

Headset Included:

no, IS ZS44 | EC49

Bottom Bracket Type:

BB92 PressFit

Cable Routing:

internal

Front Derailleur Mount:

braze-on

Derailleur Pull:

bottom

Seatpost Diameter:

31.6 mm

Rear Axle:

12x142mm thru-axle

Recommended Use:

cross country, trail

Manufacturer Warranty:

7 years

 

2016 Ibis Tranny 29 Mountain Bike Frame

GEOMETRY CHART

Tranny 29
100mm Travel Fork
  Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Height

(BBH)

Chainstay

(CS)

Wheelbase
S 14.5in 22.2in 23.9in 14.9in 26.8in 3.1in 71o 73o 12in 17.1in 41.1in
M 17in 23in 24.5in 15.5in 29.5in 3.7in 71o 73o 12in 17.1in 41.9in
L 19in 23.8in 24.7in 16.2in 29.5in 3.9in 71o 73o 12in 17.1in 42.8in
XL 21in 24.6in 25.3in 17.2in 30.5in 4.5in 71o 73o 12in 17.1in 43.6in
120mm Travel Fork
  Seat Tube

(c-t)

Effective Top Tube

(eTT)

Stack

(S)

Reach

(R)

Stand Over Head Tube

(HT)

Head Tube Angle

(HTo)

Seat Tube Angle

(STo)

Bottom Bracket Height

(BBH)

Chainstay

(CS)

Wheelbase
S 14.5in 22.4in 24.3in 14.3in 27.2in 3.1in 70o 72o 12.3in 17.1in 41.5in
M 17in 23.2in 24.9in 14.9in 29.9in 3.7in 70o 72o 12.3in 17.1in 42.4in
L 19in 24in 25.1in 15.6in 29.9in 3.9in 70o 72o 12.3in 17.1in 43.1in
XL 21in 24.8in 25.7in 16.6in 30.9in 4.5in 70o 72o 12.3in 17.1in 44in

 

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