Vital MTB: Bike of the Day – Iron Horse Sunday Prototype

On Vital MTB user Simon-Watts won Bike of the Day on 23.1.2013. That’s not too interesting, but the bike he won with is. It’s a 2010 Ironhorse Sunday prototype he won in an ebay auction.

The Ironhorse Sunday is an iconic downhill bike which Sam Hill won quite some races on. In addition the Dave Weagle designed suspension attracted a big enough fanbase so that the bike is seen in bikeparks even nowadays, 7 years after it was introduced to the market. Ironhorse has gone out of business in 2009 but before that they seemed to have been working on a new Sunday without the Dave Weagle designed dw-lnik rear suspension. Simon-Watts’ description:

Produced to replace the DW equipped Sundays when it was realized Ironhorse were loosing the rights to DW. Never produced for obvious reasons, but an exciting design. Lighter than my Medium size Sunday with same components.

Have a look at the pictures posted. It look like a classic four-bar design with an extremly low shock placement. Geometry data would be interesting, especially chain stay length an head angle. The chain stay pivot might be above the axle to circumvent the Specialized patent. Esthetics reminds me a bit of the current Trek Session (which is a good thing). I like it. Or rather “I would have liked it, if it had made it to production…”.

2 thoughts on “Vital MTB: Bike of the Day – Iron Horse Sunday Prototype

  1. Simon Watts

    Hey, just saw the piece you wrote about my Sunday pro to.
    Not to sure on geo, but head angle looked same as old Sundays, I added a 2 degree K9 reducer cup.
    BB height appears similar to my old Sunday, and the ride feels pretty similar to be honest. Low BB means it corners well, not really ridden it enough yet to make full appraisal.
    One thing I can say is the machining of pivots/shock bolts etc is far superior to the old Sundays. My old Sundays BB shock bolt was pain in butt.. always coming loose and hard to access. Proto is easy as.
    All in all though its a shame it never saw production as it appears to have been an interesting new direction for Ironhorse.
    Will post more pics in due course, maybe some details.


  2. philipp Post author

    hi simon,
    great, thanks for sharing!
    with the angle set installed it looks like a bike with a totally up-to-date geometry. i guess it will keep you happy for years to come. not having to service bearings and shock bolts that often is the icing on the cake 😉


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