I love my Simmer Blackline but now they have gone down to the 25mm tube for the new models.
Everything I've tried in 24.5 or 25mm has been bendy and I don't like it. Yes, comfy grip but for me I don't think the minor grip comfort advantage outweighs the bendyness.
Ideas?
I can definitely recommend the new Simmer SX10, I can't feel any flex and I'm 110kgs. It's hands down my favorite boom to date.
J.
NP is indeed still 27mm so that's nice to know - but I prefer the newer front end wave shape so not really considering NP
jh, have you given it a good bend next to the old Blackline? I'd be interested to know as other brands seem flexier than the older fatter models of same brand. Maybe I should look at Jesper's one next to mine..... as Blacklines have always been strong but I'd want to test
Select to expand quoteMark _australia said..
jh, have you given it a good bend next to the old Blackline? I'd be interested to know as other brands seem flexier than the older fatter models of same brand. Maybe I should look at Jesper's one next to mine..... as Blacklines have always been strong but I'd want to test
I'd ask Jesper for a go...I was using the Goya super skinny before getting the SX10 as I liked the skinny booms, SX10 wins hands down for comfort (as mentioned I don't notice any flex).
J.
The GUNSAILS 160-220 Select boom is 27.5mm dia and can fit on sails as small as 4.5m (depending on your sails specs).
Something to consider,
When I am on the Slalom board I use the 200 boom for stiffness and its width. I could be on the 180 boom with these slalom sails and be 100 grams lighter but I do like the strength of the next size up. I am over 90kg.
He has quite a few older carbon booms for sale with the thicker tube. I've sailed a few of them,a bit heavy but they are as rigid as a Maui 190-240.
If you want stiffness as half the population do,choose a longer length boom with and use less extension.
Select to expand quotepetermac33 said.. If you want stiffness as half the population do,choose a longer length boom with and use less extension.
Thanks Peter but not an option as I need 140-190
Choosing longer means I can't use my smallest sail so not helpful.
Duotone = North = grip still falls off? I dunno, but once burned twice shy.....
Will investigate though so thanks for the tip
EDIT: it shows that the Duotone 140 is only 24mm like even thinner most....? but there is also a 27.5mm wave boom. Nice
I've had a North Platinum Aero two for three years now, the grip is good as new after three Maui expeditions and regular use, I do take care of it and I don't offer it to friends to try because I don't want to bankrupt them and cause a divorce 
I'm using my first carbon boom, a 27.5 Severne Enigma 160-210 Freemove. The grip and rigidity are superb. But i'm only comparing to old aluminium booms.
I've researched this for you .. and I'm thinking the Streamlined boom is the one .. and the prices and availability are good too .. Enjoy your summer.
If you are ok with the Simmer curve and stiffness is a priority, then the extra half-kilo of carbon in the NP XC Wave is also worth considering.
If you are ok waiting until next season, then the DuoTone is worth considering (I'm guessing that you won't find stock).
New School Curve
DuoTone Platinum Aero 140-190 .. 1.95kg .. 27.5mm with grip
DuoTone Platinum 140-190 .. 2.20kg .. 27.5mm with grip
DuoTone Platinum MegaSlim 140-180 .. 2.05kg .. 24.0mm ? (assume with grip like others)
Streamlined Angulo HMX 140-190 .. 2.1kg .. 27.0mm with grip
Goya Super Skinny Pro 140-190 .. 2.12kg .. 24.5mm (I think excluding grip).
AL360 E3 Carbon 140-200 .. ? .. 28.0mm ?
AL360 Carbon Slim 140-190 .. 2.1kg .. 25.0mm ?
Old School Curve
Neil Pryde XC Wave 140-190 .. 2.60kg .. 27.0mm with grip
Simmer SX10 140-200 .. 2.3kg .. 25mm ?
Simmer SX8 140-190 .. 2.4kg .. 25mm ?
GA Slim Carbon Pro 140-190 .. 2.2kg .. 24.5mm ?
Chinook RDG Carbon 135-185 .. 2.0kg .. 24.5mm ?
Very Old School Curve
Severne Enigma 140-190 .. 2.0kg .. 25mm with grip
Maui Sails 140-200 .. 2.20kg .. 30.0mm with grip
Hot Sails Maui 140-190 .. 2.15kg .. 28mm ?
Chinook Pro 1 Carbon 135-185 .. 2.0kg .. 28mm
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For your convenience ...http://www.streamlined.us/2017-angulo-hmx-140-190cm/
www.surfsailaustralia.com.au/product/streamlined-hmx-carbon-wave-boom#surf-sail-clothing-hardware
Select to expand quoteR1DER said..
What the difference between very old school, old school and new school curve?
Just my subjective assessment of the boom curve. I just made up the three categories, although some brands, like Streamlined and DuoTone, advertise their booms as 'new school' curve. I find the 'new school' curve more comfortable to use as the front hand is closer to your body. After using the 'new school' for a few years, then back to 'old school', it feels like an extra stretch with the front arm with the 'old school'.
The 'with grip' or 'without grip' is a combination of either clearly advertised specs, my subjective assessment from trying the booms, or actual measurements. So no guarantees with that info in all instances.
24mm convert here and probably too light to notice the extra boing
Surely the 3mm weight saving could be offset with beefed up tubes ? Dunno can't find a video of carbon boom manufacturing , plenty on tennis racquets .
Maybe they could steal Starboards " carbon innegra rail band " for " core structual stiffness " and make everybody happy
Hi Mark
Your welcome to test the new Simmer Style SX10 140-200
I also have a new Simmer SX8 140-190 you can try
I use the first one and it feels very stiff for a 24mm grip.
Select to expand quoteSail Repair WA said..
I use the first one and it feels very stiff for a 24mm grip.
24mm with or without grip?
Good question Wind012.
I did wonder the same without knowing and had a closer look.
So this measurement must be the tube without the grip.
It is specified as 25mm on the Simmer website, so seems like 24mm without grip and 25mm with grip based on your updates. 
I probably should have put the Severne Enigma in the 'Old School' group not the 'Very Old School' group. A few comparison photos with the Streamlined here ...
iwindsurf.com/forums/viewtopic.php?t=30970&sid=425b979a9d98c57af3e3aafa9b71300d
wind012 thanks for all the work I don't have time to google every brands specs.
However I think your diameters are way off......... eg Duotone clearly states 24mm tube on their site and you say you assume that diameter is with grip.
The Enigma wave is a 25mm tube, not 25mm with grip. I know that as I recently had to use the end clips from Severne on another boom and measured with verniers.
Seems the standard for booms is to advertise the actual tube diameter not with grip.
Thus I don't know how many of the diameters you give are accurate.
Select to expand quoteMark _australia said..
However I think your diameters are way off......... eg Duotone clearly states 24mm tube on their site and you say you assume that diameter is with grip.
Seems the standard for booms is to advertise the actual tube diameter not with grip.
Hmm .. good point.
Note that it is only the new DuoTone MegaSlim boom is 24.0mm tube. The other DuoTone wave booms are thicker. But agree with your point.
Streamlined is 27mm excl. grip.
Maui Sails is with grip.
Simmer seems to be with grip based on feedback above.
North is excl. grip.
Neil Pryde is excl. grip.
I called Mark from SSA about a year ago and he measured the Streamlined and Goya with calipers. Should have kept those notes. Never bought either btw.
I have some calipers arriving soon, so can update the thread with a few contributions of actual measurements in a week or two. This thread can be the world repository for accurate information.
We measured some a little while back.
The dia stated by brands is usually tube dia not grip:
www.seabreeze.com.au/forums/Windsurfing/Review/AL360-Carbon-booms-2?page=1
I'd like to do some bend tests with a weight on them and measure deflection.
Even just a few of them out of interest
Select to expand quoteMark _australia said..
I'd like to do some bend tests with a weight on them and measure deflection.
Even just a few of them out of interest
Would the weight be you pulling against a 5m sail in 25 knots in logo high waves with a go pro mounted to the end of the boom with a scale drawn on the lense. This approach could probably take the rest of the season and several winter fronts to complete an accurate studdy.
