Bike fit: before and after

The top pic is from March 2006 and basically the position I rode at the 2006 Great Race when I got third in the Ironman division.

The bottom pic was taken just now. Notice how much lower and more aero. Also, my Cervelo is about a thousand times more aero than the Cannondale from 2006. Exciting.

Fork part 4: done

Finished the fork this week. Realized I spent about 20 hours working on this, which is a lot, but it was worth it. I think it looks great, there are some small imperfections, but you have to be within 6 inches to see them.

Blade dimensions are: 14.2mm wide and 80mm deep.

I had been tossing this idea around in my head for a bit, but then it was confirmed as a possibility when I read this post from Mr. John Cobb.

I had been tracking fork blade width and depths to try and see what already exists and came up with this table:

I couldnt get the width of my Cervelo Chord fork down into the range of the Lotus or Time Bandit (~10mm), so I made it a little deeper. But stayed within the depth Cobb suggested. If I started with a Jetstream could get it to be 8:1 ratio!!

Anyway, enough talk, here she is:

Racing Flats

Just picked up these track spikes that I'm going to try and use as a racing flat.

This guy has a local cobbler put new soles on track spikes with some good luck. But, I'm hoping I dont need to do that because the full sole on these look to be rubber and the spike holes seem to be sunk deep enough down.

For $22 shipped, not a bad price to try this out. Also, the heel appears to be narrow enough to fit easily into the footbeds of my Huki.

No more dust

I've been using cheap disposable masks to protect myself from dust lately while sanding the bondo on the fork.

But I just bought this for $8 shipped. Hopefully, less crud gets into my lungs.

Fork part 3

The base wood has been glued on, I applied the Bondo Glass filler and have gotten the outside of the fork blades to be very smooth. Its looking really good.

Now I just need to apply more body filler to the insides of the fork blades.

 

 

 

Fork Add on pt2

This is what I'm thinking for the fork addition:

• sand down fork (to roughen and possibly thin fork blades down past the Cervelo decals)
• glue on base wood strip (wood strip wont be as deep as the final depth of the fork)
• fill in bondo glass to create airfoil
• sand bondo and smooth
• fill in any surface imperfections with bondo body filler
• primer
• final coat of satin black
• satin clear coat

Fork Add on

Here's a before and after of what I'm thinking of doing to my fork. Adding 34mm (1.33 inches) to the back of my stock Cervelo fork to increase the depth.

Edit: the fork started out as 544 grams.

Rear Headtube Fairing Pt 2

 
Just made some changes to the rear headtube fairing: made the trailing edge sharp and smoothed out the surface as well. Bondo is cool. Though I will attach with gray tape instead of white.

Also, repainted to match the frame. I might be making another version that wraps around the headtube as well. But we'll see.

Front Aero Brake

Just installed my Tektro front aero brake. For the price ($20) this was a very good purchase and while it wont be as fast as a Hooker brake, it'll be a lot better than a standard brake. This was technically a rear brake, so I had to replace the short bolt with something longer. Fortunately, this wasnt too big of a deal.

Also, I'm hoping to fabricate some sort of carbon fairing to cover the whole unit.

Rear Head tube fairing

So I made the rear head tube fairing, and I think it came out pretty decent. I still want to sand and finish it so it looks prettier. But check out the cabling, very aero!