Same. Need to fix the broken drain pipe beneath the foundation in the spare bathroom. Want to upgrade my perfectly fine Marquise frame with the disc version.
Who is the only person to win Ironman Hawaii on a beam bike?
Same. Need to fix the broken drain pipe beneath the foundation in the spare bathroom. Want to upgrade my perfectly fine Marquise frame with the disc version.just isolate the water to that part of the house and put caution tape over the door to that bathroom. upgrade bike. situation solved.
- Aerodynamics
They aren’t specifically more aero than other designs, until they are optimized to the same level. The older Zipp model was very good for me, but wasn’t necessarily great for every rider. I have very long legs and ride very steep, so there were instances where a large portion of the beam was completely hidden when I was riding at > 5 degrees YAW. It sailed like no other.
I also have a Pearson custom that is pretty special in this category, but I did some of that aero-ing myself. It’s in the same range as an Omni or a P5 O.G.
See the P5x aero shootout for more on how aero a beam bike can be.
IDK today’s beam bikes being on par with a P5-6. Probably a touch behind. They are fine, not great. Yours may be great but I’m not giving up my Scott Plasma 3 premium for a beam bike anytime soon, at least not from the aero side of things
Not at 0 or 5 or 7.5 degrees, but maybe at 12.5 and 15. Depends on the conditions.
Honestly I don’t think anything sails the same as the Zipp. I love beans, but each one has a relatively narrow niche.
The P5 is relatively wide. It is great in a majority of situations. Omni is good across lower yaw. Beams of various sorts rule above 10 degrees along we other the Felt IA.
Horses for courses.
I got my first Dimond Brilliant about five years ago and once built I rode down the road and couldn’t believe the dampening effect of the beam. I was looking for rough road to ride over as it just takes the harsh edge off anything and is so much of a pleasure to ride. As soon as the Marquise came out I had to have one and I look at all the bikes out there but I love the ride quality of the beam bike and the features the Marquise has to offer like the built in bento and tool compartment into the frame. Bikes are each to their own and what people find sexy varies greatly. I would be lying if having a bike that stands out to others and is visually appealing to me doesn’t factor into to why I got the bike in the first place but the ride quality is what is will make me buy the next reincarnation of Dimond to come out after the Marquise.
https://www.slowtwitch.com/Products/A_very_bright_Aussie_Dimond_7171.html
sick bike
Cheers ![]()
.
Welchy, ‘94.
I’m still riding a Softride, and rode one in Hawaii in 93, 94 & 97.
Cheers,
John
I cannot answer OP question…yet…but I did just receive some images of my new Marquise from Dimond…I am really looking forward to getting this one ready to roll…

looks awesome!!
what is the cost of their nonstandard paint jobs?
Frame looks great. This year was my first on a Dimond after 3-4 years on a Giant Trinity. Absolutely love the ride of the bike and the integrated storage.
This year I messed around with my fit a bit to get the bike dialed in as the stack/reach is a bit different for this frame compared to my old one, but now that’s it’s all set I feel like I could ride all day.
looks awesome!!
what is the cost of their nonstandard paint jobs?
It depends. I think mine was $850 extra.
- Aerodynamics
They aren’t specifically more aero than other designs, until they are optimized to the same level. The older Zipp model was very good for me, but wasn’t necessarily great for every rider. I have very long legs and ride very steep, so there were instances where a large portion of the beam was completely hidden when I was riding at > 5 degrees YAW. It sailed like no other.
I also have a Pearson custom that is pretty special in this category, but I did some of that aero-ing myself. It’s in the same range as an Omni or a P5 O.G.
See the P5x aero shootout for more on how aero a beam bike can be.
IDK today’s beam bikes being on par with a P5-6. Probably a touch behind. They are fine, not great. Yours may be great but I’m not giving up my Scott Plasma 3 premium for a beam bike anytime soon, at least not from the aero side of things
Just a general reply,
Does anyone remember cornering on the old softride? I remember it being squirrelly at first but once you got used to the lateral movement you could sort of lean in…fun to ride.
In terms of looks, I hated the look of the P5x until I saw it in person. Actually like the looks of the 5x and like the 3x even more.
To your point about the plasma 3 or say our 2012 p5-6…we started looking around in the spring for a new bike for my wife, and I found it extremely difficult to justify 12-15k$ for any bike that is at best maybe 1-2 minutes faster than a (very) well thought out 2012 p5-6…
And our 17pounds starts to matter a bit over some of the grocery carts when talking about a 120pound female producing 140 watts who likes hilly courses.
The only bike we considered was the speed concept, primarily due to paint/aesthetics options.
Maurice
Thank you,
This one was around $275 extra…for additional paint color
.
Just a general reply,
Does anyone remember cornering on the old softride? I remember it being squirrelly at first but once you got used to the lateral movement you could sort of lean in…fun to ride.
Maurice
The softride’s were fun to ride. Think I had at least 3 maybe 4. You could corner like you were on rails. packed pretty well for travel also.
It’s pretty difficult to beat some of yesteryear’s bikes in today’s age. The P5-6/plasma are still holding up extremely well in aerodynamics compared to today’s bikes, at least from the testing I’ve done. Hard to justify paying the cost for something that’s only going to make me slower.
The SC, P3x & p5x are among the maybe 6-8 bikes I’d consider moving to. Mostly though it’s all marginal gains(<5-6w) over what I’ve got. Doubly hard as I project winding down racing in the next couple of years
I have to chime in here. As an owner of a Pearson, and having ridden it in at least 9 IM’s up to 2014, I can say that it was AWESOME! The only reason I stopped riding it was due to Team sponsorship. At this point, I am considering bringing it back out again for 2020. The picture you see, is as I rode it at IM Cabo 2014.
Fast, very fast bike!

If you could update this to 2020 levels that would be amazing. Sram etap on that with some tririg brakes would be amazing.
Have you thought of a Titanflex? A guy I work with has to me and loves it.
Beams of various sorts rule above 10 degrees along we other the Felt IA.
Really? I haven’t seen independent tests of beam bikes come out astoundingly well, excepting the P5X.
The Zipp was a clever innovation, but not exactly a P5 at any yaw. And this was a pretty tricked out 3001 - Ventus II, TriRig brakes, Aeox wheels, aero crank. And far from “ruling” over 10 degrees, it started to lose all claim to some kind of competitiveness vs. the P5 (or Lotus Z-bike) at 7.5 degrees.

Don’t know who the rider was there, or what tunnel it was taken in, but it doesn’t look anything like my data, so it wouldn’t be something I could speculate on intelligently.
Personally, I don’t stall on most bikes until after 20 degrees, and indeed my CdA goes down a fair bit more than shown here between 0 and 10.
I haven’t owned a Zipp in quite a few years, so I don’t have any head-to-head comparisons with the P5, but it holds up anecdotally from a watts:speed ratio for windy days. Best I’ve got to add.