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Cheapest complete Shimano 105 groupset - B'TWIN ULTRA 900 AF ROAD BIKE - 105 - £699.99 @ Decathlon
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Cheapest complete Shimano 105 groupset - B'TWIN ULTRA 900 AF ROAD BIKE - 105 - £699.99 @ Decathlon

37
Posted 2nd Jan
Bought this bike in November for £799. After a long research found that it was cheapest complete Shimano 105 bike. Now £699, I'm gutted but hopefully someone else can benefit
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2017 Model
S or XL sizes left only

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37 Comments
FRAMEOur new B'Twin Ultra frame is derived from Evo Vario technology. Aluminium is an ideal choice for obtaining an excellent propulsion-to-comfort ratio. The variable thickness tubes considerably reduce the weight.
The cables are built into the frame.
This frame is UCI-approved.
Weight: 1400g in size M.


FORK / SUSPENSIONThe B'Twin Ultra Evo Vario fork is used exclusively on the B'Twin Ultra Evo Vario frame. The combination of carbon and aluminium is the ideal choice for perfect synergy between the B'Twin Ultra Evo Vario frame and fork.
Brake located as close as possible to the fork.
Weight: 550g.


HANDLEBAR / STEM / STEERINGThe compact B'Twin handlebar is sized to the bike.
The handlebar weighs 320g in size 420mm.
End-end width:
XS, S 400mm.
M, L 420mm.
XL 440mm.
6061 T6 aluminium stem.
140g in size 110mm.
XS 80mm.
S, M 100mm.
L 110mm.
XL 130mm.
The headset uses long-lasting sealed bearings and has a 1-1/8" diameter at the top and 1-1/4" diameter at the bottom.


DRIVETRAINShimano 105 11-speed drive train.Shimano 105 SS double front derailleur. Shimano 105 11-speed rear derailleur.Shimano 105 double compact chainset.


CRANKSET / CASSETTEShimano 105 52 x 36 chainset.
Crank length varies according to size of bike:
XS / S: 170mm.M: 172.5mm.
L / XL: 175mm.
Shimano 105 11S 11 x 28.
(11/12/13/14/15/17/19/21/23/25/28).


BRAKESShimano 105 Direct Mount brakes on the fork: their dual-pivot technology offers precision and power. Stays perfectly centred thanks to DPB technology.
Brakes made from cast aluminium and covered with powder paint that withstands frequent washing.


WHEELSNew Mavic Aksium 17c wheels.
Wider rim so you can use wider, more comfortable tyres.
Height: 21mm.
ETRTO dimension: 622 x 17c.
Pair, without tyres: 1880g.


TYRESMavic Yksion tyre ensures a good connection with the Aksium 17c rim.
700 x 25.


SADDLE / SEAT POSTB'Twin Comp Ergo Chromo saddle: chosen for its comfort and efficiency.
Weight: 257g.
B'Twin Competition aluminium seat post.
Diameter: 31.6mm.
Length: 350mm.Weight: 240g.


PEDALSPedals not included.


ACCESSORIES / EQUIPMENTComes with a front and rear-lighting kit and bell.


WEIGHT


No pedals? Cold from then
Definitely hot for me at that spec. Need a bike to leave at my parents house and was thinking of something cheaper or second hand but may just go for this.

The only disadvantage from reviews I've seen is the rear brake is placed down near the bottom bracket which makes it awkward for maintenance and gets more dirty. Would have preferred a compact crank and maybe an 11-32 cassette too.
A lot of spec for the money, good price. Heat. You can also get the Triban RC520 for £729 majority 105 apart from cranks and rear cassette. Great store Decathlon!
CantGetNoSleep49 m ago

Definitely hot for me at that spec. Need a bike to leave at my parents …Definitely hot for me at that spec. Need a bike to leave at my parents house and was thinking of something cheaper or second hand but may just go for this.The only disadvantage from reviews I've seen is the rear brake is placed down near the bottom bracket which makes it awkward for maintenance and gets more dirty. Would have preferred a compact crank and maybe an 11-32 cassette too.


You are right about the rear brake, never understood why they put it there. Apparently for aerodynamics but if that's the case every TT bike on TDF will do the same.
Most sizes out of stock
It seems like Decathlon's ultimate goal is to sell bikes for the rrp of the groupset alone... Not quite there, but getting close.
This bike is the older 105 5800, not the newer 105 R7000.
Excellent deal. Not the latest 105 but that won't really make a difference. Aksium wheels are worth about £150 themselves.
Destroy your testicles in style with this
Brilliant bike, fantastic price.
I paid RRP for this when it came out 2 years ago and still think it’s an absolute bargain! It rides really well on flat or hills, made riding a real joy for me. My only gripe is the position of the back brake, I don’t know why they put it there, it’s just a hassle.
Edited by: "Oblix82" 2nd Jan
mikeonuk2 h, 33 m ago

Destroy your testicles in style with this


Are you talking a load of balls?
ccparkhill3 h, 45 m ago

This bike is the older 105 5800, not the newer 105 R7000.



cos 2017 Model bike
Great value, to get Aksium wheels at this price point is brilliant. I wouldn’t think twice if I was after a road bike for commuting or as a first bike.
fergee18 m ago

I wouldn’t think twice if I was after a road bike for commuting or as a f …I wouldn’t think twice if I was after a road bike for commuting or as a first bike.


But now you're above all of that................................
Good deal!! I have the previous version of this bike and but for some of the finishing kit and paintjob is exactly the same. In that time done over 4000 miles across all weather and road conditions and has performed well above initial expectations. Frameset does allow for conti 28c tyres if that helps anyone.
Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 (do not know the year) at £750 be a good buy? I know nothing of bikes but want to start cycling and do short Tri in 2019... Comments are appreciated...
Can someone explain the frame description?

Our new B'Twin Ultra frame is derived from Evo Vario technology. Aluminium is an ideal choice for obtaining an excellent propulsion-to-comfort ratio. The variable thickness tubes considerably reduce the weight.
The cables are built into the frame.


Evo vario technology just brings up sunglasses in a google search and how do you have a ratio between propulsion and comfort, maybe 3:1. Can I make the assumption that Evo Vario is just their stupid term for butted tubes. Also what actual aluminium is it made from, is it mechanically or hydro-formed, is it heat treated etc? Weight limits for btwin bikes are the lowest of any brand and the frame description just seems to be complete waffle. I've seen reports that btwin frames have been sourced from many countries including China and places like Hindustan. Whatever the overall value of the bike the frame description is not very inspiring in the least and seems the worst kind of marketing b*****ks that could be hiding a fairly low quality frame. Fit for purpose I'm sure for those within btwin's low weight limits.
spitfire513 h, 22 m ago

Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 …Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 (do not know the year) at £750 be a good buy? I know nothing of bikes but want to start cycling and do short Tri in 2019... Comments are appreciated...



Sounds like a good deal. Make sure you can fit Tri bars on it and as always if it doesn't fit you well then its not going to be a good deal.
spitfire513 h, 22 m ago

Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 …Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 (do not know the year) at £750 be a good buy? I know nothing of bikes but want to start cycling and do short Tri in 2019... Comments are appreciated...


That sounds like a very good deal indeed. If it's a fairly recent model, it will have a full carbon frame and fork and likely be Shimano 105 components. The defy model is the endurance relaxed frame geometry, the tcr is a bit more aggressive, and the propel is the full on aero version, so tcr sits in the middle between aggressive /relaxed riding position. Generally get very good reviews wherever you look, and if it's your first outing, should be a decent platform in which you can build from.
bonzobanana03/01/2019 08:41

Can someone explain the frame description?Our new B'Twin Ultra frame is …Can someone explain the frame description?Our new B'Twin Ultra frame is derived from Evo Vario technology. Aluminium is an ideal choice for obtaining an excellent propulsion-to-comfort ratio. The variable thickness tubes considerably reduce the weight.The cables are built into the frame.Evo vario technology just brings up sunglasses in a google search and how do you have a ratio between propulsion and comfort, maybe 3:1. Can I make the assumption that Evo Vario is just their stupid term for butted tubes. Also what actual aluminium is it made from, is it mechanically or hydro-formed, is it heat treated etc? Weight limits for btwin bikes are the lowest of any brand and the frame description just seems to be complete waffle. I've seen reports that btwin frames have been sourced from many countries including China and places like Hindustan. Whatever the overall value of the bike the frame description is not very inspiring in the least and seems the worst kind of marketing b*****ks that could be hiding a fairly low quality frame. Fit for purpose I'm sure for those within btwin's low weight limits.


Can't comment on the sales jargon, but can comment on the frame itself. Having owned the same frame for 3+ years, which is used regularly as my commuter bike, and with me around 93 kilos and seat post mounted panniers approx 7kilo, the frame has had no issues with the weight and bumps encountered on our bomb hole ridden roads.
Guys read the review here
bikeradar.com/roa…87/
It was one of the bikes of the year for under £1000. I wouldn’t worry about rider weight either as the frame , and more importantly the wheels should be fine.
Other things I like are the internal cables, and the frame and forks come with a lifetime warranty. Superb value.....
spitfire5103/01/2019 07:22

Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 …Sorry to hijack this thread, but would a brand new Giant TCR Advanced 2 (do not know the year) at £750 be a good buy? I know nothing of bikes but want to start cycling and do short Tri in 2019... Comments are appreciated...


Where? Stick a link up there and we can tell you
CantGetNoSleep03/01/2019 13:42

Where? Stick a link up there and we can tell you


It is a guy from the running club, who is selling the bike...

It is white and blue brand new... Cannot figure out the year.... But apparently all carbon.... Having said that it won't make any difference for me...
MasterYodaJedi2nd Jan

A lot of spec for the money, good price. Heat. You can also get the Triban …A lot of spec for the money, good price. Heat. You can also get the Triban RC520 for £729 majority 105 apart from cranks and rear cassette. Great store Decathlon!


Triban RC520 about to buy one of these, a great spec perfect for commuting.
Anyone know if the XL would be a good fit for someone who’s just shy of 6ft 2” ?
devious1104/01/2019 02:30

Anyone know if the XL would be a good fit for someone who’s just shy of 6 …Anyone know if the XL would be a good fit for someone who’s just shy of 6ft 2” ?


I'm 185 cm, tried L for 2 days but got XL at the end and I'm happy with the choice. The way I understand L is easier to manoeuvre and xl is more power efficient. A friend also said that the L size looked small for my size and xl looks perfect. Hope this helps
Edited by: "Andrej_Lazarovski" 4th Jan
spitfire5113 h, 37 m ago

It is a guy from the running club, who is selling the bike...It is white …It is a guy from the running club, who is selling the bike...It is white and blue brand new... Cannot figure out the year.... But apparently all carbon.... Having said that it won't make any difference for me...


Assuming it is full 105 groupset, really brand new and (most importantly) it fits, then it is a decent price and worth going for
Andrej_Lazarovski7 h, 17 m ago

I'm 185 cm, tried L for 2 days but got XL at the end and I'm happy with …I'm 185 cm, tried L for 2 days but got XL at the end and I'm happy with the choice. The way I understand L is easier to manoeuvre and xl is more power efficient. A friend also said that the L size looked small for my size and xl looks perfect. Hope this helps


Cheers!! Had been looking for a bike forever so just took the plunge!
Cam11773rd Jan

Can't comment on the sales jargon, but can comment on the frame itself. …Can't comment on the sales jargon, but can comment on the frame itself. Having owned the same frame for 3+ years, which is used regularly as my commuter bike, and with me around 93 kilos and seat post mounted panniers approx 7kilo, the frame has had no issues with the weight and bumps encountered on our bomb hole ridden roads.


I think they whole point of not giving precise information about frames as and using marketing talk instead of exact information as done by many US brands, GT for example is so they can use frames imported from multiple factories. Decathlon have been hugely successful and have shops all over the world I know they are strong in places like India and Russia I believe and have assembly plants in many countries. The frames are imported from all over the place. The 100kg total load limit which is the lowest of all main bicycle brands as far as I know. That is likely what it is certified to take and provide a reasonable lifespan. I would expect a bicycle frame 10% overloaded to still last 3 years. Aluminium frames always get weaker with use and time as they have no endurance limit so start off very strong and get weaker. Lifetime warranties don't normally cover normal fatigue which is seen as fair, wear and tear. Welds failing is what is normally covered over the long term.

My point is about the frame description which is just rubbish. However I personally wouldn't just dismiss Btwin's weight limits as stated in the manual surely that is a legal statement of what they are declaring the bike is capable of and to go beyond that you do at your own risk. If the frame fails and you end up under a articulated lorry you can hardly blame Decathlon for it. Many bikes even road bikes have a total load limit as high as 160kg and a lifetime guarantee like Giant although I think they have a lower weight limit for their performance road bikes which might be 145kg total load. They are at the top end, most bike brands fall between those 2 limits. I think Halfords are 120kg rider weight limit, Calibre at go outdoors are at 120kg total load. Some bikes give a weight limit of rider and luggage but do not include the bike weight. I'm pretty sure Decathlon are the lowest at total load including everything at 100kg which for a heavy bag designed for carrying shoppoing (city bike etc) means a very low rider weight limit.


decathlon.co.uk/ecu…pdf
Quite alot of the lighter wheel sets have weight limits of 100Kg - if Decathlon put such a set of wheels on a bike then regardless of frame strength, the whole bike weight limit will be set at that of the lowest part - more likely the wheels than the frame in most cases. Ironically, cheaper bikes using cheaper wheelsets often have a higher weight limit because they have robust but heavy wheels.
apreading3 h, 44 m ago

Quite alot of the lighter wheel sets have weight limits of 100Kg - if …Quite alot of the lighter wheel sets have weight limits of 100Kg - if Decathlon put such a set of wheels on a bike then regardless of frame strength, the whole bike weight limit will be set at that of the lowest part - more likely the wheels than the frame in most cases. Ironically, cheaper bikes using cheaper wheelsets often have a higher weight limit because they have robust but heavy wheels.


The weight limit of 100kg is applied across pretty much all bikes with the only exception I know of being a rather robust folding bike. The one with the instant fold I forget the name of. They also have some history of frame failures with one model having 4 years production recalled and another where only the largest rockrider frames (i.e. tallest heaviest riders) were failing with some examples only weeks after purchase. I've seen comments where it was stated the bikes appear to have the same rider weight limits as many bikes sold in China itself who as we know tend to be shorter lighter people. It's quite possible using frames to the spec as retail Chinese models with reduced strengthening saves btwin some money.

I have to say though I bought a cheap Btwin rockrider frame its the Rockrider 500 model and it seems very well made and strong. However on a visit to a Decathlon store perhaps 6 months ago I saw the current models which do not look anywhere near as strong. It's a wierd thing though to state 100kg for all bikes. Heavy city bikes should be able to take more weight you would think but the manual lists them all at the same level. In my opinion though we should take btwin at their word and the specifications they give. If you wish to use a bike beyond its load capacity you can but for heavier riders at least btwin should not be recommended until their weight limits increase.

I do plan to ride my Rockrider bike when assembled despite being over their 80-85kg rider weight limit (bike will be 14-15kg when assembled) it will probably be a bit of an abomination as I'm using older components I have that have been lying about, it might end up with a disc brake at the front and V at the back etc..
Could anyone recommend pedals for this?
devious1106/01/2019 01:07

Could anyone recommend pedals for this?


That's a wide question, depends cleats or no cleats, what type of cleats... I can say that although it says no pedals I received this bike with basic pedals. I swapped those for decathlon.co.uk/500…tml
I find dual pedals most convenient so you can ride with or without cleats
Edited by: "Andrej_Lazarovski" 6th Jan
Andrej_Lazarovski14 h, 37 m ago

That's a wide question, depends cleats or no cleats, what type of …That's a wide question, depends cleats or no cleats, what type of cleats... I can say that although it says no pedals I received this bike with basic pedals. I swapped those for https://www.decathlon.co.uk/500-spd-dual-mtb-pedals-id_8379913.htmlI find dual pedals most convenient so you can ride with or without cleats


Thanks bud, much appreciated. Total newbie here
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