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November 12th, 2012

Cialis sales I have the pleasure to introduce to you one of my favorite builds in recent memory, cialis sales a road bike for Patricia:

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Cialis sales Let us first note that some Conti Classic tires are destined for those white Velocity rims, cialis sales fear not! This is just what was on hand.

Cialis sales So the most refreshing thing about this is all the lovely silver, cialis sales am I right? This is Campy Veloce 10, cialis sales great for anyone who thinks that 10 is the proper maximum number of cogs on a cassette, cialis sales and just easy on the eyes as well as working flawlessly. Cialis sales The rims are Velocity Aeroheads in white, cialis sales and a Thomson seatpost and stem and Ritchey Classic bars round it out. Cialis sales

Cialis sales Before I talk about the challenges of this geometry, cialis sales some more pics of the frame:

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Cialis sales Ok, cialis sales so Patricia came to us with a Davidson custom frame that fit well, cialis sales but she wanted some tweaking and more to the point, cialis sales she wanted lugs. Cialis sales Conventional lugs are cast with a conventional geometry in mind – 73 degree seat and head tubes, cialis sales 60 degrees between the DT/ST & DT/HT. Cialis sales Well. Cialis sales Not so much here. Cialis sales We were shooting for a traditional look, cialis sales so didn’t want to go past a 2 degree slop on the top tube; and we wanted to do a slack head tube and plenty of rake in fork for toe clearance. Cialis sales All of that helps to use off the shelf lugs, cialis sales but it left us with an untenable 57 degrees between the down tube and seat tube, cialis sales which effectively ruled out any available lugged BB shell. Cialis sales So, cialis sales we chose to weld all the BB joints, cialis sales and I just promised to keep it soft so it won’t look too out of place. Cialis sales

Cialis sales Patricia chose the colors and layout, cialis sales and all I can say is I approve.

Cialis sales Now, cialis sales that was the start of a small frame – let’s look at one from back in the archives…

Cialis sales DESTRUCTIVE TESTING

Cialis sales We don’t have the budget to do a lot of destructive testing, cialis sales which is why we tend to stick with what we know. Cialis sales Fortunately, cialis sales we have friends who are badass racer-types and every once in a while, cialis sales one of these friends gets in a scrape. Cialis sales Liane was in the middle of a pileup on her nearly ten-year-old Cirlce A (pre-stainless head badge!) and this was the result:

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Cialis sales Most important to note, cialis sales not only did she walk away, cialis sales she attempted to ride away. Cialis sales Then her front wheel hit the down tube… well. Cialis sales At first blush, cialis sales you might think this is a terrible thing for a builder to see. Cialis sales But actually, cialis sales it’s a great study in frame building, cialis sales stress risers, cialis sales and why we love steel.

Cialis sales First, cialis sales let’s note that this was a serious, cialis sales catastrophic impact. Cialis sales Clearly the front triangle has buckled in several places, cialis sales but perhaps not clear from the pictures is that the fork is bent as well; the blades are bent slightly back, cialis sales and the steerer is bent a touch at the crown. Cialis sales But what’s really interesting is what happened to the frame. Cialis sales

Cialis sales For the builder, cialis sales the best thing is that Liane walked away. Cialis sales The second best thing is that it didn’t break at a joint. Cialis sales In other words, cialis sales the forces applied to the frame were transferred from the wheel, cialis sales through the fork and into the front triangle of the frame – which is what happens every time you get on a bike – and in this extreme situation, cialis sales when those forces achieved a moment that was beyond what the frame could handle. Cialis sales it sort of broke all over. Cialis sales

Cialis sales It’s a study in stress risers; see how the top tube buckled at the cable stop, cialis sales and the down tube at the shifter boss and the BB lug. Cialis sales Then you have the buckling in the down tube – exactly in the middle of the tube. Cialis sales In other words, cialis sales it was trying to bend, cialis sales but eventually the center could not hold. Cialis sales

Cialis sales This is what happens with well made, cialis sales lightweight bikes. Cialis sales They can break. Cialis sales But they will usually not break at a lug (even a minimalist, cialis sales bikini lug as seen here), cialis sales at a fillet or at a weld. Cialis sales And, cialis sales unlike aluminum or carbon, cialis sales we can fix it. Cialis sales As I do here.

Cialis sales With a silver brazed frame, cialis sales relatively little heat is used to join the lugs and tubes. Cialis sales So, cialis sales you generally have the option of heating the joint and pulling the tube out, cialis sales or cutting and grinding it out. Cialis sales In the case of a full front triangle, cialis sales I generally will pull the top tube out of the seat lug, cialis sales but I like to grind out the dt from the bb. Cialis sales This is mostly because there is so much mass at the BB, cialis sales it takes a lot of heat on all four joints there. Cialis sales In general we like to keep the heat cycles down, cialis sales but this is more important in a high stress area like the bb as opposed to the seat collar. Cialis sales When was the last time you saw a bike break at the seat lug? Ok, cialis sales so here’s work on the BB shell:

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Cialis sales For the seat lug, cialis sales I cut the center of the tube out and use a bungee cord to pull it straight out. Cialis sales This helps keep the seat lug in shape; pulling by hand or trying to twist it out can distort the hot metal. Cialis sales

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Cialis sales Note the shadow of silver on the top tube in the shape of the lug. Cialis sales This is what we in the frame building industry refer to as full penetration. Cialis sales In other industries this might mean something else.

Cialis sales Anyway, cialis sales here’s the (re) finished product:

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Cialis sales So, cialis sales we hope this sort of thing never happens to you. Cialis sales But if it does, cialis sales we can help.

Cialis sales Next: Jeff’s fixie rando! I know, cialis sales what? And 29er fever takes hold!

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This entry was posted on Monday, November 12th, 2012 at 11:09 pm and is filed under Bike Repairs. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

One Response to “Free Viagra Sample”

  1. Russell says:

    November 13th, 2012 at 7:21 pm

    Patricia your bike looks wonderful, very elegant. I agree with Chris the silver is lovely, great wheels too.

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