1994 Serotta Colorado ATi - and a Lot of DIY Anodizing

[Dr Dremel]

Friends don´t let friends drive Gripshift, that´s all I can say Thumbies also look much better in combination with the CNC brake levers.

The handlebar is just crazy. Schmolke stuff is generally high quality, but 75g? Holy smokes. Time to bring out the torque wrench to mount this I guess.

 

[MuchAlohaNui]

Friends don´t let friends drive Gripshift, that´s all I can say

Ha!

The handlebar is just crazy. Schmolke stuff is generally high quality, but 75g? Holy smokes. Time to bring out the torque wrench to mount this I guess.

Even these old bars he stands behind them. He was rather serious when going over the data sheets from the 90's and comparing his construction to present day before he would even sell them to me. Sooooooo, we'll see though? It's not like I am taking this bike to North Shore B.C. anyhow. Or am I?

Aesthetically, the Grip Shift 'look' heavy. I guess we'll have to see how things progress.

 

[MuchAlohaNui]

Wheels wheels wheels; rims and spokes. I have the hubs sorted (32 H) but have a few questions regarding mid-90's rims and spokes. Did this exist: A rim that was both durable for XC/single track with eyelettes that weighed sub 375-380 grams?

Campagnolo Mirox?
Sun M14A?
American Classic 350's?
Matrix Mr. Titan?

Regarding spokes, was anyone making anything out of titanium? I am aware of the death spokes from Fiber Flite, but of particular interest would be titanium (possibly double butted).

Any ideas or recommendations?

 

[br0qn]

Wheels wheels wheels; rims and spokes. I have the hubs sorted (32 H) but have a few questions regarding mid-90's rims and spokes. Did this exist: A rim that was both durable for XC/single track with eyelettes that weighed sub 375-380 grams?

Campagnolo Mirox?
Sun M14A?
American Classic 350's?
Matrix Mr. Titan?

Not quite 375-380 but getting close with

Bontrager BCX
Ritchey WCS

both available in 94.

In '95 the Bontrager had the red labels coming in at 370g but intended for front only while the heavier blue for the rear. Still, a red/blue set weighed 780g

 

[MuchAlohaNui]

Not quite 375-380 but getting close with

Bontrager BCX
Ritchey WCS

both available in 94.

In '95 the Bontrager had the red labels coming in at 370g but intended for front only while the heavier blue for the rear. Still, a red/blue set weighed 780g

Thanks for the suggestions. I'll have a look into those.

The claimed weight of the Campagnolo Mirox are 376 grams and appear to be complaint-free aside from the slightly angled braking surface where some people can't seem to get their brake pad angle set properly.

I thought too the Mr. Titan was an option but read first-hand information from a guy who worked at the factory lamenting the super light 330-333g rims were utter dog shit, but the newer ones closer to the 375g weights are from after QC at their factory was rectified and ramped up.

Titanium spokes will also be a huge weight savings, but I don't know...sourcing anything will be a test of patience.

 

[benjabbi]

Campag Atek and Mavic 230 both hover around that weight and were both fairly popular so relatively easy to get hold of.

 

[MuchAlohaNui]

Campag Atek and Mavic 230 both hover around that weight and were both fairly popular so relatively easy to get hold of.

Were'nt the Atek's problematic? IIRC they were hard to keep true because the aluminum used was kind of meh for durability. They seem to be popular here on Retro though.

The Mavic 230 was a good tip. Claimed 369 grams. Supposedly pretty strong. Those look interesting...

 

[benjabbi]

I think you have to accept that once a 26" aluminium rim with a brake track gets below 400ish grams durability will be affected.
Also rim weight can vary quite considerably, I recently built some 230s one was 364g, one 397g. 33g is nothing really but as a percentage it's almost 10% heavier.

 

[MuchAlohaNui]

Small update:

Preparing for some titanium and aluminum hardware to arrive. The non-drive side bolt on the fork was stripped so I needed to use an extractor to back it out. In the picture it doesn't look like much but m5 was too big and m4 slopped around and spun freely. Once that was off I weighed the fork brace / brake booster. I noticed the booster used to be anodized blue/turquoise, so I may need to fix that back to colored in the near future, maybe blue maybe purple. Also found an M5 aluminum screw that fits perfectly to hold on the brake cable stopper.

I pulled off the blue pulley wheel from the rear derailleur, replaced with the original then pulled the rear derailleur off to make room for something different which is arriving soon. Goodbye m900, have fun on the Klein Attitude.

...and I bought a new scale that will read out 0.1g increments because the one I have been using is wandering even after replacing the battery so I am certain my measurements are off. I can put on a given bolt for example, with an arbitrary weight of 5 grams and over the course of two minutes watch the weight increase almost 80 %.

 

[MuchAlohaNui]

I think you have to accept that once a 26" aluminium rim with a brake track gets below 400ish grams durability will be affected.
Also rim weight can vary quite considerably, I recently built some 230s one was 364g, one 397g. 33g is nothing really but as a percentage it's almost 10% heavier.

I don't want to accept it . Though from what I can ascertain with recent reading, 400 grams seems to be that tipping point between reliability vs. light, so I agree with you.

That is a big variance with the 33 grams. Was that due to one braking surface being more worn than another or were these NOS?