Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Will 32mm GP5000 tires fit on a Merida Scultura (2023)?

Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Will 32mm GP5000 tires fit on a Merida Scultura (2023)?

Old 02-24-24, 06:28 AM
  #1  
Senior Member
Thread Starter
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 851
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 471 Post(s)
Liked 3 Times in 3 Posts
Will 32mm GP5000 tires fit on a Merida Scultura (2023)?

Sorry for yet another tire-clearance thread...but I haven't found the answer anywhere else.

I have a 2023 Merida Scultura (normal "race" model, not the Endurance version), which came with 17mm IW rims and 28mm Continental GrandSport Race tires. I want to replace these with tubeless GP5000 tires and need to decide between 28, 30mm and 32mm versions.

The Merida specs state support for 28mm tires, but as we know, manufacturers hedge their bets and don't tend to specify rim and tire combinations that will definitely fit (or not).Currently the 28mm GrandSport Race tires measure 29mm wide and 27mm tall. There is 5.5-6mm space at the narrowest point, between the rear tire and the chainstays.

Everything I have read about the 32mm GP5000 tubeless tires is that they measure narrower on narrow rims (17-19mm), but tend to grow a bit with usage, but are still less than true 32mm, e.g. BRR shows the max width as 31.4mm - https://www.bicyclerollingresistance...-tr-comparison

Even if the 32mm GP5000s measured 4mm wider than the current 28mm Grandsport Race, I would still have 3.5-4mm clearance at the chainstays. Clearance for height is a lot more generous on the Scultura - minimum of 10mm at the fork crown and to the seat tube, so I'm not concerned about height increase.

Just wanted a sanity check from someone who has actually fitted these tires before I buy a set!

Thanks!
johngwheeler is offline  
Old 02-24-24, 10:42 AM
  #2  
I'm good to go!
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 14,953

Bikes: Tarmac Disc Comp Di2 - 2020

Mentioned: 51 Post(s)
Tagged: 0 Thread(s)
Quoted: 6178 Post(s)
Liked 4,796 Times in 3,308 Posts
Find the place on your tires that comes closest to rubbing anything on your bike. How much distance is that? Usually seat tubes, chain stays and the underside of the fork crown are problem points. If you have caliper rim brakes then check that too for how much clearance there is to it's mount point in the center.

If the difference in the tire size from what you want to get and currently have is less than the place you measured that has the least clearance to the tire, then you might be good. But different model tires measure slightly different from their stated nominal size. Also, you should leave a certain amount of space for times when your tires might pick up mud or other debris. I once went briefly through some gumbo mud we have here and quickly came to a stop on the other side because the mud jammed the tire. And I think that bike probably had a ¼ inch clearance as I wasn't running over size tires on it.

Tires change in height by about the same as they change in width. At least it's close enough. If you are needing to know to the last couple millimeters, then you probably aren't leaving nearly enough room for safety.

Last edited by Iride01; 02-24-24 at 10:45 AM.
Iride01 is offline  
Old 02-24-24, 01:51 PM
  #3  
Senior Member
 
Join Date: Apr 2019
Location: UK
Posts: 1,404
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 682 Post(s)
Liked 453 Times in 338 Posts
I have 30mm GP5000s on 19" internal rims and that doesn't seem ideal, a bit balloony, not sure I'd want to go to 17 on even wider tyres.
choddo is offline  
Likes For choddo:
Old 02-24-24, 05:28 PM
  #4  
Senior Member
Thread Starter
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 851
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 471 Post(s)
Liked 3 Times in 3 Posts
Originally Posted by choddo
I have 30mm GP5000s on 19" internal rims and that doesn't seem ideal, a bit balloony, not sure I'd want to go to 17 on even wider tyres.
The tire shape is certainly a consideration in terms of support when cornering, or for aerodynamics. That said, I think 17mm rims are compatible with up to 50mm tires, even though anything > 28mm is probably not optimal.
johngwheeler is offline  
Old 02-25-24, 06:16 AM
  #5  
Senior Member
Thread Starter
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 851
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 471 Post(s)
Liked 3 Times in 3 Posts
Originally Posted by Iride01
Find the place on your tires that comes closest to rubbing anything on your bike. How much distance is that? Usually seat tubes, chain stays and the underside of the fork crown are problem points. If you have caliper rim brakes then check that too for how much clearance there is to it's mount point in the center.

If the difference in the tire size from what you want to get and currently have is less than the place you measured that has the least clearance to the tire, then you might be good. But different model tires measure slightly different from their stated nominal size. Also, you should leave a certain amount of space for times when your tires might pick up mud or other debris. I once went briefly through some gumbo mud we have here and quickly came to a stop on the other side because the mud jammed the tire. And I think that bike probably had a ¼ inch clearance as I wasn't running over size tires on it.

Tires change in height by about the same as they change in width. At least it's close enough. If you are needing to know to the last couple millimeters, then you probably aren't leaving nearly enough room for safety.
Thanks for the reply. As mentioned in my post, I have about 5.5-6mm clearance at the closest point, which is between the rear tire and the chainstays. If the reports of the 32mm GP5000 width are correct (and that could be a risky assumption!), then tire width would increase about 3mm (1.5mm per side), and clearance would be about 4mm at the chainstays, which is I believe the ETRTO recommended minimum.

I'm really just trying to get some real-world experience from someone who has tried this. Theory is all well and good, but practice is better!
johngwheeler is offline  
Old 02-25-24, 06:35 AM
  #6  
Senior Member
Thread Starter
 
Join Date: Mar 2017
Location: Sydney, Australia
Posts: 851
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 471 Post(s)
Liked 3 Times in 3 Posts
Adding some information that I've just found relating to the Merida Scultura Team edition - which shares geometry with the (much!) cheaper Scultura 6000:

From: https://velo.outsideonline.com/road/...uled-for-2022/

"That tyre clearance now officially sits at 30 mm. Merida has indicated that this figure is playing it safe to ensure compatibility with all rim and tyre combinations. For example, it has been confirmed that Continental GP5000 tyres in a 32 mm width fit without issue. The bike comes fitted with 28 mm tyres. "

The article doesn't cite the reference for this confirmation, but it sounds positive. I have also seen another review of the custom Merida Reacto aero bike fitted with 32mm GP5000s (https://granfondo-cycling.com/merida...m-2021-review/ ), so it certainly seems to be something that Merida supports on some models of their road bikes.

I think I am confident enough to buy some 32mm GP5000s and give it a go. I will post an update to let you all know the results!
johngwheeler 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.