Go Back  Bike Forums > Bike Forums > Cyclocross and Gravelbiking (Recreational)
Reload this Page >

What fenders do you have on your Topstone?

Notices
Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like : "Unbound Gravel". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

What fenders do you have on your Topstone?

Old 03-31-20, 02:58 PM
  #1  
MiPeGr
Senior Member
Thread Starter
 
Join Date: Sep 2018
Posts: 89
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 8 Times in 4 Posts
What fenders do you have on your Topstone?

So I'm thinking about adding fenders to my Topstone (AL 105), and I'm having a bit of trouble figuring out what will fit and what will not.

Ideally, I'd like to have a single set of fenders (full-coverage type, more-or-less), that would work for both 700c X 32 and 650b X 47, but I don't know if that's possible, since 650bx47 is a bit smaller diameter than 700xc32 and I don't know how closely the fender curve is designed to fit, or if it can be manipulated a bit.

I've come across one person who specifically mentions a 700x50 (Planet Bike Cascadia ALX) fender, so I know that width/size would work, but it seems a little narrow for a 47mm tire. But without a 650b set of wheels (yet), I can't just measure directly what the (fork/stay) spacing is. So I'm hoping all the other Topstone owners out there (and there sure seem like a lot of them), can offer me some advice. What about a 700x65mm fender? What about a 650bx55/60/65?

So what fender are you running on your Topstone, and with what tire? Please post pics of mounting points and clearances, if you can.
MiPeGr is offline  
Old 04-02-20, 01:57 PM
  #2  
westrid_dad
Senior Member
 
westrid_dad's Avatar
 
Join Date: Oct 2007
Location: Idaho
Posts: 142

Bikes: Surly Ogre, Cannondale Topstone 105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked 18 Times in 11 Posts
I've posted some pics recently of my fender setup on my Topstone 105. I am running the SKS Speedrockers with a set of flaps from Ass-savers. I am only running 700c wheels currently, either the stock WTB Nano (700x40) or a set of Continental GP 5000s (700x28) on a difference wheelset.

Anyway, here are links to the posts, let me know if there are other questions on this setup.

SKS Speedrockers

SKS Speedrockers with Ass-savers flaps
westrid_dad is offline  
Old 04-02-20, 02:25 PM
  #3  
MiPeGr
Senior Member
Thread Starter
 
Join Date: Sep 2018
Posts: 89
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 8 Times in 4 Posts
Thanks...I've seen those posts. I didn't call it out explicity, because the width of the speedrockers won't cover the 650Bx47's I plan on running off-road. Those could be a good choice for me if they were available in a wider form-factor.
MiPeGr is offline  
Old 04-02-20, 07:07 PM
  #4  
westrid_dad
Senior Member
 
westrid_dad's Avatar
 
Join Date: Oct 2007
Location: Idaho
Posts: 142

Bikes: Surly Ogre, Cannondale Topstone 105

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 10 Post(s)
Liked 18 Times in 11 Posts
Originally Posted by MiPeGr View Post
Thanks...I've seen those posts. I didn't call it out explicity, because the width of the speedrockers won't cover the 650Bx47's I plan on running off-road. Those could be a good choice for me if they were available in a wider form-factor.
That's a good point. With my current gravel tires (WTB Nano 700x40), the SKS fenders do just provide enough coverage width-wise. I'm not sure how that would correlate to the 650Bx47 tires you're considering. That being said, I do think my WTB Nanos are running wider than 40mm.

Last edited by westrid_dad; 04-02-20 at 07:12 PM.
westrid_dad is offline  
Old 12-10-20, 10:51 PM
  #5  
antmaster5000
Junior Member
 
Join Date: Apr 2017
Location: Seattle
Posts: 164

Bikes: BMC TeamMachine, Surly Pacer, All City Big Block

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 89 Post(s)
Liked 53 Times in 27 Posts
I'm curious if anyone has tried these with 650b wheels. Also have 650b x 47mm and these would be perfect for my bike.
antmaster5000 is offline  
Old 12-10-20, 11:34 PM
  #6  
MiPeGr
Senior Member
Thread Starter
 
Join Date: Sep 2018
Posts: 89
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 8 Times in 4 Posts
I just got a set of SKS Edge 55 fenders that I expect will be able to cover both my 650bx47 and 700cx32. Will be trying to fit them over the weekend & will follow up.
MiPeGr is offline  
Old 12-11-20, 12:31 AM
  #7  
Chi_Z
Senior Member
 
Chi_Z's Avatar
 
Join Date: Dec 2013
Posts: 507

Bikes: Niner RLT 9 RDO

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 262 Post(s)
Liked 68 Times in 50 Posts
Originally Posted by MiPeGr View Post
I just got a set of SKS Edge 55 fenders that I expect will be able to cover both my 650bx47 and 700cx32. Will be trying to fit them over the weekend & will follow up.
it would not work, the radius of the fender would not match neither 32 or 47
Chi_Z is offline  
Old 12-11-20, 12:56 AM
  #8  
MiPeGr
Senior Member
Thread Starter
 
Join Date: Sep 2018
Posts: 89
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 8 Times in 4 Posts
SKS website specs the Edge AL 56 (not 55 like I said above) for 650b and 700c 38-50. What am I missing?
MiPeGr is offline  
Old 12-11-20, 07:38 AM
  #9  
Koyote
Senior Member
 
Join Date: Sep 2017
Posts: 6,558
Mentioned: 35 Post(s)
Tagged: 0 Thread(s)
Quoted: 5969 Post(s)
Liked 9,034 Times in 3,907 Posts
Originally Posted by Chi_Z View Post
it would not work, the radius of the fender would not match neither 32 or 47
Originally Posted by MiPeGr View Post
SKS website specs the Edge AL 56 (not 55 like I said above) for 650b and 700c 38-50. What am I missing?
I'm only on my second cup of coffee, so might have done the numbers incorrectly...Or I might just be missing something, as I have never tried this. But here goes:

650b with a 47mm tire should be about 678mm overall diameter; 700c with 32mm tire should be about 686mm diameter. (That'll depend partly on the tires' profiles - some are rounder, some are more squat, and even that depends partly on the rim width.)

With a roughly 8mm difference in tire diameter, the same fenders might fit -- but the mounting will need to be adjusted for the wheel swap unless you will accept a sloppy fender line.

The problem that you will definitely face is having fenders that are the optimum width for one tire, and a very sub-optimal width for the other tire. I would think that you would want to use fenders wide enough to cover the 650bx47 tires, but then they will be ridiculously wide on the 700cx32 tires. Like, stupid wide. But if that doesn't bother you aesthetically, you'll get good coverage.

If it were me, and I wanted to fender a bike, I would pick a wheel and tire size and be done with it. On a fendered bike, just pulling off the wheels can be a bit of a hassle, and so I prefer to do it as little as possible.

Last edited by Koyote; 12-11-20 at 08:46 PM.
Koyote is offline  
Old 12-11-20, 08:42 PM
  #10  
MiPeGr
Senior Member
Thread Starter
 
Join Date: Sep 2018
Posts: 89
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 41 Post(s)
Likes: 0
Liked 8 Times in 4 Posts
Originally Posted by Koyote View Post
With a roughly 8mm difference in tire diameter, the same fenders might fit -- but the mounting will need to be adjusted for the wheel swap unless you will accept a sloppy fender line.
...
But if that doesn't bother you aesthetically, you'll get good coverage.
This particular aesthetic concern carries no weight with me. As for other hassles & considerations...I'll just have to wait to see until I have them installed.
MiPeGr is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.