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2012 Moots Psychlo X RSL — Build

The experts at Palo Alto Bicycles helped me spec-out the Pyschlo X RSL of my dreams. I intend to use it heavily for cross training for the Everest Challenge.

Discussion continues below.

2012 Moots Psychlo X RSL titanium cyclocross bike, custom Di2 cable routing
Cannondale Hollowgram SL crankset with FSA bearings
Shimano DuraAce Di2 front derailleur
Shimano DuraAce Di2 rear derailleur modified for XTR 11-36 MTB cassette
Ritchey Log carbon seat post
Ritchey Logic carbon handlebar
Ritchey Logic WCS260 aluminum stem
Handbuilt wheelset with DT Swiss 240s hubs
TRP mini v-brakes
Bontrager Affinity RXl saddle
Shimano XTR 'Trail' pedals with guards removed (sawed off)
King titanium bottle cages with Moots bead blast finish
Schwalbe Racing Ralph tires

Moots Psychlo X RSL designed and
built by the experts at Palo Alto Bicycles

Build summary

Custom-built Moots Psychlo X RSL weighing 18.4 pounds as shown above:

* Ritchey Logic post and stem are much less expensive and a little lighter than going with Moots titanium, hence an easy decision.

In-depth Discussion


Custmo Psychlo X RSL frameset with Di2 cable routing holes, no cantilever post, all extras removed since there is only one (1) external cable to the rear of the bike, for the rear brake.

All extraneous frame braze-ons removed for an ultra-clean look (no cantilever brake post, no cable routing for shifter cables!). A little lighter, a lot more elegant.


While I am a very strong rider, gearing is still critical for the steep hills I ride, which can be up to 20% grade. Therefore, I am going with a 50 X 34 chainring and an 11-36 MTB cassette, for a friendly gearing ratio of 34 X 36 for those steep hills.

50-34 X 11-36

The initial build used the Cannondale Hollowgram SL crankset 50 X 34, but that crankset is moving to my Moots Vamoots RSL (with SRM power meter spider for Cannondale, the goal being the lowest possible weight). The Psychlo X RSL will then be fitted with the SRM 7950 power meter crankset.


I had a handbuilt clincher wheelset built at Palo Alto Bicycles. All weights in grams. This is a lightweight wheelset with some compromises: aluminum nipples, light weight rims. See the full wheel build details.

A similar wheelset, but with tubular rims is planned for later in the spring. My preference is tubulars, except when traveling and riding in remote areas.

For those with unlimited funds and racing inclinations, consider the Lightweight Standard tubular carbon fiber wheelset, which would drop more than a pound off the bike weight.


For the planned tubular wheelset, Challenge Griffo tubular tires (I can carry a lightweight road spare in case of a flat, plus a valve stem tool and Stan’s NoTubes sealant, because I like tubulars).

For the clincher wheelset, Schwalbe Racing Ralph HS 425 Evolution 33-622 700 X 33C (320g) Black Skin.

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Cantilever brakes are a dangerous idea on the hills I ride, and just plain no fun— cantilever braking is noisy and very inferior to road brakes (cantilevers are good for slowing down and that’s it). Mini V brakes with their much superior braking power are appropriate for my usage— I am not planning on racing in thick mud, mud clearance being the only justification that I am aware of for cantilever brakes.


I wanted as solid a shoe platform as possible, so I went with the Shimano XTR 'Trail' pedals, which have a wider platform for better support, but also aluminum guards around the pedal body. These guards are not needed for my cyclocross use, so I had the pedal guards sawn off (!), reducing the 374 gram pedals to 335 grams (for comparison, 'Race' pedals are 305g, previous XTR pedals are 325g).

Rear derailleur

Shimano DuraAce Di2 rear derailleur modified with custom machined cage for use with Shimano XTR 11-36 MTB cassette. Derailleur weighs 242 grams after modification.

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