X2 – New and Improved Geometry

I’m close to finalizing X2′s geometry.

I find that X1 fits and handles really well, exceptionally well considering was the first frame I’ve designed, I guess all the reading and research on frame geometry and handling paid off ….. mostly! There was one problem, the reach was a little generous, I’m not sure where or how I oopsed, but the handlebars were slightly too far out for my comfort. A quick change to a 90mm stem made short work of that problem, but even still riding on the hoods still fells just a tad bit stretched out.

X2′s geometry is based for the most part on that of X1. Aside from the handlebar position, I think this is the best fitting/most comfortable frame I’ve every had.

I’ve been reading Gerard Vroomen’s (gerard.cc) blog lately, specifically some older posts where he describes how the trend of lowering the handlebar height over the past 50+ years is not yielding any rider advantage and likely providing more pain than gain. It got me thinking that I would incorporate a higher bar height in X2′s geometry which then led into what other geometry changes I’d incorporate. I know I want to go back to a 100mm stem, so I’ve shortened the reach, I’ve also made the headtube a little taller as well, this will help raise the bars without the need for extra spacers. Now that everything looks good on paper (thanks BikeCAD!), I spent a little time revisiting X1′s geometry and realized that if I removed a few mm’s worth of spacers and flipped my stem over (going from -6° to +6°) I can get the handlebars in almost the exact same position (relative to the BB) where X2′s will be. I made the changes and went for a short ride, so far so good, the position feels ok. I’ll continue to ride X1 setup like this and as long as everything continues to feel ok than I think I’ve got X2′s geometry finalized.

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Four and Five

Frames number four and five have both been started, one of which will be for myself.

Both will sport fairly standard road geometries, will have longer chain stays to accommodate fenders, and will feature internal cable routing.

In keeping with the ‘X’ naming scheme I’ll be naming my frame ‘X2′.  The second frame is as of yet unnamed though I’m sure once the build begins one will come to me.

I’m still in the process finalizing the frame geometries and will post specs and BikeCAD visualizations once completed.

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Summer in March

 

Last week we were on the ski hill, a week later the snow is gone and we’ve put away the skis for our bikes. Earlier this week there were huge sheets of ice on the river floating by like mini icebergs on the dead calm water, today all that was left was some slush being washed against the shore by the waves.

With these daily temperatures if feels like we’ve gone straight past spring and directly into summer, here’s hoping it lasts!

 

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BikeCAD

What a great tool. So far I’ve been using BikeCAD to help me visualize and tweak all of my frames.

After the weekend on the FatBike, I’ve had these marshmallow shod rides on the brain.  I’ve come to the realization that I’ll likely be building one out of bamboo in the not so distant future.  I think I’ve figured out how to design the seat and chain stays to clear the 4″ tires and have already found sources for the non-standard bits (100mm BB, rims, tires, fork, etc…).

Here’s a BikeCAD visualization of what I’m calling  ”PhatBike”
PhatBike (Bamboo Snow Cruizer) concept

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Fat Bikes

I first saw one of these bikes with the huge balloon like tires early last fall, parked outside amongst a couple of cargo bikes at my local bike shop, I paused for a second to take a look and then continued on into the shop to get whatever I had gone in for that day and didn’t give the Fatbike a second thought.

Fast forward to February, its been just over 2 months since the snow first started flying, restricting my cycling activities to the trainer, when I saw someone out on one of these Fatbikes. As they glided across the far end of the pond and disappeared into the forest I was amazed by what looked like a stable and effortless ride, two things I would not have associated with cycling in the snow! Later that week, a buddy of mine mentioned that he saw a whole group of riders out on these bikes with really big tires while he was out skiing.

Well now I had Fatbikes on the brain. After a little bit of research it turned out that the shop where I first seen the bike in the fall rents them out. It was a no brainer, I reserved one for the weekend and right after work on Friday headed over to pick a large white Surley Pugsley with a granny smith green Brooks saddle and bar grips, the colors of the shop.

Day 1
I live in a location ideally suited to snow biking, with no shortage of easy to access riding possibilities. My neighbourhood is bordered to the east by a forest with a large pond in the middle and to the north and west by a river and bay, to the south there’s a pathway system what travels east/west along the river banks. My first ride was on the same pond where I had seen the Fatbike earlier, then a quick jaunt thru the forest and out onto the pathways which had been hard packed by a combination of skier, snow shower and walking traffic.

My first impression of this bike was how amazingly stable and sure-footed this bike was. I have ridden my road bike in early spring over patches of snow and ice that has yet to melt and the main thing I remember was the squirrely feeling in the back-end when going over the slippery stuff in anything other that a straight line. The Fatbike did not suffer from this in the least, WOW.

The bike was heavier that what I’m used to but after a couple of minutes I didn’t seem to notice. In fact on hard packed or even up to 3 inches of loose snow on top of a crusty base, peddling was fairly easy going. Anything more than 3 inches was a different story and you definitely felt it.

After about an hour and a half, I realized that I probably should have spent more time on the trainer this winter as my legs were definitely starting to feel the workout, luckily my route was more or less in a big loop and I wasn’t too far from home.

Day 2
Hello sitbones! I felt them a little after my first ride but didn’t realize the magnitude until I got back on the saddle, I decided to just ignore and continue. Today I jumped over right onto the river and rode along the shoreline. The ride was great, I had a good time the day before and even more so today. I have ridden this route many times before on the shore, riding on the river offered a completely different perspective. The river surface was a combination of a hard crust of snow with a few patches of glare ice. The biggest difference between the ride the day before was how SMOOTH the river was, it was almost like riding on ashvault.

Day 3
The bike had to be back at the shop for 10am, plenty of time between getting everyone off to school/work and 10am for another ride. I didn’t go very far, mostly just stuck to the trails through the forest behind the house and a quick jaunt down the river and back in the opposite direction from the day before. These Fatbikes make winter riding in the snow completely possible and enjoyable, opening up a whole new potential for winter cycling. I enjoyed myself immensely.

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Completed bikes

Just added pages and images for some of my previous builds under Bamboo Frames.

29er (minus niner), a super cool “Dirt Racer” with 20inch wheels.
Bluebird, a confortable and very capable road bike.
X1, the  prototype that got me hooked, not quite finished due to not wanting to be without for the time it would take to finish.

Right now there are just some pics, keep an eye on those pages, I’ll be adding more descriptions/info shortly.

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First post

Well you have to start some place so here we are……

I first became interested in bamboo bikes after a colleague of mine returned from a trip to Calfee Designs to be fitted for a new tandem, the conversation about the trip ended with “… and they had these really cool bamboo bikes!”.  A trip to their website and I immediately fell in love.  Not only did I want a bamboo bike I needed to build it for myself.

Having a mechanical aptitude and a DIY pension for building things, I then spend the better part of a year researching (or depending on who you talk to obsessing over)  frame building, the effects of frame geometry, mechanical properties of bamboo, etc…

After amassing some appropriately sized bamboo stalks from various local sources and finding a suitable “donor cycle” from which to harvest the necessary steel bits (dropouts, head tube, bottom bracket) I began construction on the “Prototype”, the end result exceed any and all expectations with respects to ride properties, durability and ascetics!

Fast forward to the present day, in addition to the “Prototype” I have continued to hone and refining my build techniques building frames for family members, a second 700c road bike “Bluebird”, and a children’s mountain bike for my little guy dubbed “29er minus 9er”.

I was not prepared for the attention these bikes garner, it’s impossible to go for a ride without someone stopping (and in a few cases, with cyclist traveling in the opposite direction,  u-turning and racing to catchup) to admire and ask questions, the conversation going alone the lines of:

“is that bamboo?” … “NICE!!!” … “where did you get it” … “I can’t believe you made it” …  ”you should sell them” …

I’ve honed my skills now to the point that I’m now saying why not.

I will use this blog to showcase the bikes I have built, the frames I’m currently in the process of building and share tips and insight I’ve accrued with others who may be interested in building their own bamboo frames.

 

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