Which TT/Tri framesets have horizontal rear dropouts? Thanks.
I only know about my bike, but it has horizontal dropouts. It is a Cervelo P2 Classic.
Felt IAxx has rear horizontal droupouts.
My BMC TM02 has horizontal dropouts.
My canyon speedmax has it to
.
My specialized transition does. They are a pain in the ass.
2014 cervelo p2
.
QR TiPhoon
.
What is it about horizontal dropouts that people find so frustrating? Not aimed at OP in particular, just wondering. I have a p2c and never really had an issue with them.
Slippage, perhaps?
I’m thinking about doing some fixed gear TT’s and horizontal dropouts are obviously preferred.
I’ve been planning on building up a fixed gear TT bike as well. I’m still torn between a dedicated aero track frame with a TT fork & brake or a traditional TT frame with a fixed wheel. There are a couple options to making a fixed gear work even with vertical dropouts though, and no guarantee that horizontal TT dropouts will provide enough range to actually make your preferred gear work with good chain tension. Running a track wheel in a TT frame with 130mm dropouts means adding spacers to the axle and potentially dealing with a pretty bad chainline. There are a few 130mm track hubs, but they are generally 32 holes+ which might not be ideal.
The vertical dropout options are:
White Industries Eno Eccentric Hub. Available in 130mm, 28 hole, fixed/free
Wheels manufacturing Eccentric Bottom Brackets for PF30 or BB30 to 24mm cranks
I’m definitely not convinced that horizontal dropouts are a deal-breaker, but obviously they would do no harm and might give you more options to make everything work smoothly. I’ll be curious to see what you decide on!
P5 has horizontal dropouts.
It makes removing/installing rear wheel finicky, but the advantage is that you can snug the rear wheel up nice and close to the frame cutout.
Quintana Roo PR-6 comes with both styles. They can be switched to suit your choice. They snap into a fitted recesses on the inside of the chain stays and are held by two bolts.
QR cd0.1
.
What is it about horizontal dropouts that people find so frustrating? Not aimed at OP in particular, just wondering. I have a p2c and never really had an issue with them.
I don’t know if it is a quirk of my bike, or if others have the same problem, but I have never had such a hard time changing a tire. Usually, I can pop that rear wheel off and on in a heart beat, but there was a certain amount of swearing and repositioning with the bike that has horizontal dropouts the one time I changed a tire on it.
The Fuji Norcom Straight sort of has the best of both worlds: vertical dropouts that slide to adjust the length of the chainstay.
Another option is to download a widget called “Fixmeup!” (http://eehouse.org/fixin/fixmeup.php) that calculates the chainring and cog combination(s) that produce an acceptable chain tension for a given chainstay length and chain angle (if any). I used it years ago to pick the right chainring to buy to set my Hooker TT bike as a track bike.
The downside is that you may be limited to only a few, or even a single, gear ratio that works for you, but for a one-off event it worked for me (I ended up on a 55 x 13).
My original alu Cervelo p3 has them
.
Another consideration is that it has to be UCI legal for next summer when I plan to race. I still haven’t read up on the recent changes that have or may occur regarding the UCI and frames.
Blue - my previous Triad and my current Triad SL both have them. On this frame there isn’t much tire clearance, and having horizontal dropouts allows me to slightly adjust when putting race wheels on with slightly wider tires.