Bike tires
Hi, my bike rims are 622*15c and i currently have 622*23 (700) tires. I am planning to do a coast to coast which may include some off road...
What sort of tires would you suggest? what are the largest tires the rims can take? Thanks |
Ummmmm ..... no way to know what your rims can fit because you never mentioned rims .... but if your rims were designed for 15-mm tires, which as far as I know are not even produced or used (except in C&V-land) then your wheels are probably old and tired and need replacing.
If you mean your wheels have 15-mm internal width, you should have no trouble fitting 28s, assuming the 28s clear the frame. I would not want to do much off-road with 28s .... but "offroad" is not a definition it is a description. Rock-hard baked mud, no problem. Sand, loose gravel, pea gravel, single-track? Game trails? Pastureland? I suggest tires built to ride the terrain you plan to ride. No idea what that is. I have done supported coast-to-coast, on pavement, on 23s ...... but all the gear was on a vehicle and all the roads were paved. And a few times i wished for wider, softer rubber .... chip-seal is brutal. On the same ride I used a second bike with 32s and it was much better. I also did a south-north tour, fully loaded, on 32s and again exclusively on pavement. No problem. |
Feel free to tell us more about the bike, the route, your cycling experience, your ideas of fun on a bike ... whatever.
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Sorry made a mistake. Yes i meant 15c internal frames on a boardman 2018.
Would 28 be the max? There might be paving/gravel and the odd muddy path i.e canal path. Its Carlisle to Newcastle, hopefully not too extreme, but i dont want to damage the wheels. I won't be doing things like forest trails. So more grip/comfort/less likely to damage wheels it the idea |
Originally Posted by Jamesrigby
(Post 22648123)
Sorry made a mistake. Yes i meant 15c internal frames on a boardman 2018.
Would 28 be the max? There might be paving/gravel and the odd muddy path i.e canal path. Its Carlisle to Newcastle, hopefully not too extreme, but i dont want to damage the wheels. I won't be doing things like forest trails. So more grip/comfort/less likely to damage wheels it the idea |
Originally Posted by alcjphil
(Post 22648135)
This is how misunderstandings happen. You mentioned a coast to coast ride without mentioning which country you live in. I live in Canada. A coast to coast ride here is much different than a coast to coast in the UK. Included information is important
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Originally Posted by Jamesrigby
(Post 22648221)
Thats fine. Mainly looking to tire sizes I can use...would 32 fit for example?
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Whether a certain size tire will fit on the rim is one thing. Whether the fork and/or chain stay/seat tube clearance is sufficient to accommodate that size tire is something else.
I see Boardman bikes, but I don't see a 2018 model. If that is a model year, then you need to provide info on the model, since Boardman seems to make a full line of bikes (road/racing, hybrid/commuting, mountain). If you don't have specs on clearance for tires for your particular model (some manufacturers will give info on what size tires are appropriate for certain models, but many don't), then your best bet is to bring your bike to a bike shop and get their advice. Unless you can find someone in this forum with your bike or a very similar one, it will be very hard for any forumite to give you definitive answers. . What brand and model of tires do you have on the bike now? How much clearance is there between the current tire and the fork (crown and blades)? How much clearance is there between the tire and the seat stays at the narrowest point, and between the tire and the seat tube? Given that info, you might get someone willing to give advice on how much bigger you might be able to go. Also, if you're fitting fenders on your bike for your tour, be aware that will affect the clearance, and may force you to use a smaller tire. |
Originally Posted by alcjphil
(Post 22648225)
They might be a bit wide for the rim, but the bigger question is whether you have sufficient frame clearance. You mention a 2018 Boardman bike but no mention of the model or type of bike it is
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Originally Posted by Jamesrigby
(Post 22648123)
Sorry made a mistake. Yes i meant 15c internal frames on a boardman 2018.
Would 28 be the max? There might be paving/gravel and the odd muddy path i.e canal path. Its Carlisle to Newcastle, hopefully not too extreme, but i dont want to damage the wheels. I won't be doing things like forest trails. So more grip/comfort/less likely to damage wheels it the idea |
IMO, 622x15c is a appropriate way to describe a rim size. It lets me know that it has a BSD of 622mm and a internal width of 15mm and is a crochet or hooked rim.
So how that confused anyone I don't know. Though it would be nice to know if you are also talking about aero rims that have a profile or just plain rims, which is what I'd assume since you didn't give that information. Welcome to BF. As you can see, just like we all have *******s we all have opinions too! |
Sheldon brown tire sizing page
The go-to chart for determining which width tires will fit a particular rim can be found at the late Sheldon Brown's website https://www.sheldonbrown.com/tire-sizing.html. Scroll down until you see the chart in red and green. This tells you which tire widths are safe with your existing rim. As others have already said, then you need to know how much room is available on the front fork and rear part of the frame. What might be safe might not fit inside the frame or between the brakes if it has rim brakes.
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Welcome to the forum.
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Originally Posted by Jamesrigby
(Post 22648123)
Sorry made a mistake. Yes i meant 15c internal frames on a boardman 2018.
Would 28 be the max? There might be paving/gravel and the odd muddy path i.e canal path. Its Carlisle to Newcastle, hopefully not too extreme, but i dont want to damage the wheels. I won't be doing things like forest trails. So more grip/comfort/less likely to damage wheels it the idea I've even done short tours on 23s. The best way to find out if a tire will fit your frame is to try it. I got a junk 28 from a bike shop to try on one of my bikes and it was too tight. One of my bike will not fit a 25. |
Originally Posted by Iride01
(Post 22648529)
IMO, 622x15c is a appropriate way to describe a rim size.
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Originally Posted by cxwrench
(Post 22648807)
Not really. The 'c' goes with '700'. A 700c rim has a diameter of 622mm.
I take it that the OP got the 622 x 15C from a label or stamp on the rim. So I'll stand by my assertion that it means crochet or hooked rims. Rims[edit]ISO 5775-2 defines designations for bicycle rims. It distinguishes between
Rims are designated by their nominal rim diameter and their nominal width, separated by a cross (×). Both are measured in millimeters. The rim type codes SS or HB precede the rim designation, whereas code C is appended to the nominal width. Examples: SS 400×20, HB 422×25, 620×13C Now if the OP had given that from something stamped on the tire, then you and I may or may not be correct. Some very good tire manufacturers actually state the c is simply a further reference to 700C. However I really doubt that and think their document writers messed up and ask someone that didn't really know. Other tire manufacturers will state that the C after the width on the ISO stamp of their tires means that the tire should only be used on crochet or hooked type rims. But like the years it took to convince the internet that Otto Titslinger didn't invent the bra, I'm sure this misconstrue will also take some time to sort itself out. |
Originally Posted by Iride01
(Post 22649131)
Yes really! You need to read my complete reply. You don't even represent what I said correctly in the way you repeat it.
I take it that the OP got the 622 x 15C from a label or stamp on the rim. So I'll stand by my assertion that it means crochet or hooked rims. https://en.wikipedia.org/wiki/ISO_57...h%20ISO%205775. Now if the OP had given that from something stamped on the tire, then you and I may or may not be correct. Some very good tire manufacturers actually state the c is simply a further reference to 700C. However I really doubt that and think their document writers messed up and ask someone that didn't really know. Other tire manufacturers will state that the C after the width on the ISO stamp of their tires means that the tire should only be used on crochet or hooked type rims. But like the years it took to convince the internet that Otto Titslinger didn't invent the bra, I'm sure this misconstrue will also take some time to sort itself out. |
Originally Posted by Jamesrigby
(Post 22648076)
Hi, my bike rims are 622*15c and i currently have 622*23 (700) tires. I am planning to do a coast to coast which may include some off road...
What sort of tires would you suggest? what are the largest tires the rims can take? Thanks If in doubt ask your local bike shop. |
Originally Posted by cxwrench
(Post 22649265)
If that were case then maybe you could explain how there are 700c hookless rims now. Like Enve and Zipp are making. I'll be waiting.
We were talking about what the ISO size meant. Not what the 700C means. Not that any tire or tube manufacturer has to even follow ISO standards. There is nothing regulatory about it and it is quite out of date for things made today. So that's where the disparity of what you and I are discussing comes in. So you have to know which rim and tire manufacturer you are talking about to even correctly say for certain what a size designation means. So if you need more evidence then how about this from Continental Bicycle Tire ... Continental recommends that you mount bicycle tyres on hook edge type rims only. Hook edge type rims provide a more secure hold, especially with air pressures exceeding 44 PSI (3 bar). These advantages are safety-relevant. From 73 PSI (5 bar) onwards, the hook edge type rims are even stipulated by the ETRTO guideline. This rim type, for example 622 x 13C, is indicated with a rim base diameter in mm (size D), the rim width in mm (size A) and a “C” for crotchet (Illustration 6 ). If the size information on older rims is no longer legible, the rim width can simply be measured by using a calliper from one hook edge to the other. An overview listing the appropriate rim width for every tyre size is also available from ETRTO (also look at the chart 7 ). If you wish you can go to Schwalbe's site and dig up the one that says C is simply a reference to the old french sizing system. But that's not in my favor. But at least I gave you something for you to back up your so far unsupported assertions where I have now given two in my favor. |
I rarely quote Sheldon, but have a look at this chart, about halfway down the page. It's the one titled 'French sizes'.
Tire sizing |
OP: You'd be fine running 32mm on those rims. The only caveat I'd add is that it's not going to give you the most optimal tire shape in terms of handling, so if you're planning on routinely railing corners at extreme lean angles then you'd probably want a narrower tire.
You mention "off-road" in your original post. You've likely concluded that your current 23mm tires are insufficient for anything other than smooth pavement. A 28mm road tire is more capable, but still not good for much beyond very smoothly graded dirt/gravel roads. I'd recommend going larger if your frame can handle it. |
https://cimg2.ibsrv.net/gimg/bikefor...b3be1fb5d2.jpg
Someone else calls them 700 x 25C |
Originally Posted by Jamesrigby
(Post 22648076)
Hi, my bike rims are 622*15c and i currently have 622*23 (700) tires. I am planning to do a coast to coast which may include some off road...
What sort of tires would you suggest? what are the largest tires the rims can take? Thanks |
Vegas Triker @ 12 above refers to a Sheldon Brown page. Which relays current ETRTO guidance. Yes, a 15mm internal rim takes a 32mm tire. The ETRTO guidance is the range where absolutely nothing might go wrong. You can use wider tires than that on a 15mm rim.
In early days of MTB we all rode big tires on narrow rims. Back in day when I routinely rode 28-35mm tires on 13 and 14mm rims it was noticeable that the tires squirmed a bit above 30mph and sprints could get too interesting. When good wider rims became available same tires worked much better. But at normal speeds no one would notice anything. I can imagine touring loads might provoke squirming. And will also say that back when most rode narrow for everything and a 28mm tire was considered just huge lots of people toured on 13mm rims. Those who rode wide tires did much better than those who paired the narrow rims with narrow tires. |
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