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Added a comment about feature Steel, American-Made, High-Pivot Enduro Bike - Evan Turpen, Contra Bikes - The Inside Line 10/28/2021 7:15 PM
E.T.

Thanks Will! Yeah with some manipulation the shock will come out the left side of the bike. I am working to improve clearances further in this area to make it even easier to install or remove a shock on the next one (and also increase clearance for shock pumps). This prototype has been great for checking real-world clearances and function as I eventually work my way towards the refined production frame. If you've got bike designs you want made, you don't have to be a good welder, you just need to know and hire the right people to weld it for you. John Caletti did a great job welding the first two prototypes for me and it takes the guesswork out of that part of the bike. Nice to know the welds are solid when sending it on a prototype bike!

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Added a comment about feature Steel, American-Made, High-Pivot Enduro Bike - Evan Turpen, Contra Bikes - The Inside Line 10/25/2021 12:59 PM
E.T.

Thanks Jeff! If you are ever in the Santa Cruz area and want to try a bike for yourself, I should have a few test bikes available after I launch.

This feature has 19 comments.

Added a comment about feature Steel, American-Made, High-Pivot Enduro Bike - Evan Turpen, Contra Bikes - The Inside Line 10/25/2021 12:53 PM
E.T.

Thanks for the kind words! I am planning on getting out and doing some races next year and should have a few bikes for people to check out at those events. I would also like to have demo rides available in the future once I'm up and running. These would be out of the Santa Cruz area (if you live nearby or are willing to take a trip out here). There will be more info about this on the Contra Bikes website once we launch.

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Added a comment about feature Steel, American-Made, High-Pivot Enduro Bike - Evan Turpen, Contra Bikes - The Inside Line 10/21/2021 12:33 PM
E.T.

Thanks Hugh! I couldn't have arrived at this bike without all of your hard work, advice, and knowledge you've shared.

This feature has 19 comments.

Added a comment about feature Steel, American-Made, High-Pivot Enduro Bike - Evan Turpen, Contra Bikes - The Inside Line 10/20/2021 11:04 AM
E.T.

I do a lot of the fabrication myself (jig construction, mitering, lathe and manual mill work), but I did have quite a bit of help from Noah of Hillside Frameworks on the fabrication side of this one, John at Caletti Cycles did the welding, Dave at Mather Machining did the CNC work on the links, idler, shock mount, tie-bar, and idler carrier, Jeremy at Powder Coat It did the powder coating, and my friend Hans up in Oregon at Motor Control Technology CNC'ed the chain guides.

This feature has 19 comments.

Added reply in a thread MTB Tech Rumors and Innovation 11/21/2020 8:42 AM

For sure. There are still 6 bars, but the additional 2 bars are just for shock actuation. It ain't no Felt Equilink! It looks exactly like the new Enduro, but with a motor.

Added reply in a thread MTB Tech Rumors and Innovation 11/19/2020 8:48 AM

There are six bar linkage versions zipping around in the woods by me!

Added reply in a thread Michelin tires thread! 11/12/2020 8:35 AM

I just ordered a set of the DH 34 Bike Park Edition tires (because of this thread) for my trail/enduro bike. They were on sale for $39 a piece at Cambria Bike (I think there's only one left there now). I figured if the tread design can work well in a ... more »

Big Bird left a comment 6/27/2020 10:07 AM
Big Bird

I've finally got some work for the first time since February building bikes at Art's. I'll measure up some kids bike geometry and do some graph paper work to see if it's feasible.

Big Bird left a comment 6/27/2020 9:26 AM
Big Bird

Million Dollar Idea for you Evan. I'm in the middle of watching the Fantasy Fort William video and it's interesting to see the different wheel sizes compared. Us adults have moved up from 26, past 27.5 to 29. While kids bike geometry really hasn't changed. They start at 12" to 16" to 20" and up, all while sat high above the bike like adults on 26 years ago. The Idea...

Why not design a bike for beginners that starts with bigger wheels, perhaps starting with 20's, where they get to sit lower IN the bike like an adult on 29"s?

Added a comment about feature Turpen's High-Pivot 29er Prototype 6/25/2020 10:15 PM
E.T.

Thanks Josh! I remember you from Post Office days...I don't trust my welding skills enough yet so I actually had John Caletti of Caletti Cycles do the tig welding for me. I did all the fabrication of parts including the jigs, and mitering all the tubes, but left the CNC work up to local machinist Dave Mather of Mather Machining. He made the lower link, upper link and idler pulleys that I designed. I had a look at all your projects in the past...Cool stuff for sure! At your height what would you say is your ideal reach and stack dimension if you were to make a trail/enduro bike for yourself? You're well over 6 feet right? I'm still researching sizing demands for taller riders...

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Added reply in a thread FORUM HOTSEAT - Transition Bikes Crew 4/30/2020 9:27 AM

Tech question here...with roughly 50% of bicycle companies using "Horst" link suspension designs, do you guys experiment with/ride other designs to see if there is a potential different route to explore in the future? A way to differentiate yourselves ... more »

Added reply in a thread Coronavirus and MTB Events 4/8/2020 9:04 AM

Lost and Found gravel race cancelled with no refunds or credits! Sierra Buttes Trail Stewardship keeping potentially $200,000 in entry fees for an event that is not happening. Thoughts?

Added a comment about press release Introducing Ochain - A Clever Chainring Spider Designed to Reduce Pedal-Kickback 3/31/2020 7:01 AM
E.T.

Cesar Rojo already has a patent granted on a similar design...https://patents.google.com/patent/ES2670470B1

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Added reply in a thread How to heckle at a race? 5/3/2016 10:25 AM

Watch and learn from one of the best...Griz! https://youtu.be/RpnsOLYie2w

Added a comment about product review Tested: Leatt 3DF Hybrid Knee Pad 11/23/2015 9:02 PM
E.T.

@ JBSDesigns: Why do you not believe in 3DF Foam? Is this based on real life experience? If so was it with this specific pad? Or a much lighter version?

I too would like to see scientific testing to compare, but this would have to be done by an independent laboratory.

With the 3DF Hybrid model from Leatt I had zero doubts in the material. I actually felt like it had better protection than my Fox launch knee cup which has a hard plastic shell within. I've crashed on many a knee pad and this one did its job as advertised.

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